This content simplifies complex physics into a mere survival guide for standardized exams. It values tactical utility for career advancement over a deep understanding of scientific principles.
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🔥Army Bharti 2026 | Physics 01 | Agniveer GD Science Basic | Army Exam 2026 | MsGuruMathsAjouté :
Jai Hind Vande Mataram friends how are you sir He is good because he is working hard and This time we have to become soldiers, have faith Bapu They say your son will definitely return as a soldier.
Not that the most important thing about success is that She falls in love with those who work hard.
She falls in love with those who work hard. sound The desire for victory is over. Now throw yourself into this fire Threw it away. Thokare says that he will be killed.
Courage says we will see. says with courage Yes, we will see. So my dear brother, Quickly check the sound again and again that it is modifiable Both have to be visible, my brother.
The sound is perfect dear, please come quickly Come quickly my darling Tell me my dear brother Tell me to be calm and not to rush Show your strength and create history Tell me my dear brother Come quickly, my dear brother, you say We were saying that Sir, we find Physics tough.
Laila, today we have your physics class, right?
They are putting it in front of us while making it smoke My dear brother for physics class Getting ready and studying comfortably is the top priority.
The question is what is Lalla, my dear Brother, these are the top questions, what should we do about them?
Yes sir, I want to blow smoke, yes my marathon Tomorrow is Lalla, he is on them only.
You are on the study today, Anand.
What are you waiting for today my dear brother?
Enjoy Physics Sir Top Questions I brought it which will add more fun to it.
Come on brother, please like and etc. once quickly.
To two sir's classes.
Hey brother, please come quickly once sir Let's get the class started. Absolutely Sir, get it done in a stormy manner. once all Brother, what should I do Lala, please like it.
Hey Lala, tell me, it will be topic wise for your Lala.
Yours will be topic wise. come quickly My dear brother. Wake up all the brothers.
Why brother, has physics class started?
Of Physics. Hey brother, tell me topic wise.
I will take it Lalla, it is a marathon, my dear Brother, I am here, please introduce the Physics teacher.
I am there, right, those who did not like it Like it once and then once again, right?
Send it, whatever my brother sends, send it.
Sir, tell me my brother Hey my brother, I have told you, Lalla, tell me three times.
Diya Na Pyare, tomorrow there will be a topic wise marathon Isn't it so, tell me yes sir, my dear brother I I am presenting it to Sir, read it comfortably.
Those brothers who have less time can take it later.
I'll see what's wrong, my love If you are my brother then my brother, once in my heart Throw it at me so that I can call Sir.
I have taken all my brothers, look at them with all your heart.
Have Physics questions that bother you?
Why does the AK-47 shock Lala?
It's an AK-47, why does it give a shock? Now we'll take it.
What is AK-47? Why is AK-47 shocked?
Let me tell you this, my dear brother So if I offer it to Sir, then bring it Sir.
Come here my brother, in a perfect way So brother, here is what I have in front of you today.
Brother, I have presented it to the physician.
My dear brother, I am his brother.
I only reach up to their shoulders, Laila.
I come only up to your shoulder, my dear brother Those who have studied physics comfortably think that Sir, I am short of time, so that You must watch the class later.
Go but we should not pay attention to the PDF If you haven't watched the class properly So we are not giving PDF, right my dear Brother, please allow us to go now.
Sir, let me start with a motivational line.
do. Lala got one question wrong in Physics Will not done. Lala, this thing is guaranteed.
Jai Hind my military brothers. all of you Welcome to this platform. considered that There is a lot of sleep in the eyes. I believe that the eyes I am very sleepy but not sleeping. this is that It's time Lala, which I don't want to lose, which I want to lose No. Let's start without losing this moment This is our physics Brahmastra series.
In which I have brought the top 100 for you.
Questions. outside of this in your exam There will be no single question. of this I I'll give you a little guarantee. Let's start Let's start our session. by hitting on Our first question is AK-47 AK-47 Why do you shock?
Lalla, look at this question again.
Why does the AK-47 deliver a shockwave? Option A Because it is run by the military. Option B Because Because the shock comes from the sound of a gun.
and option C is Newton's third law of motion.
Due to the law and Option D, the magnetic force Reason. So dear children, the correct answer is Option C. Newton's third law of motion Because the AK-47 delivers a shock. How the AK-47 Works Does it? Understand this. This is the barrel of a gun.
A bullet is placed in the barrel of this gun.
It has happened. This bullet contains gunpowder and There is a pin at the end here.
Which is called firing pin.
Firing pin.
When we press the trigger of a gun, it The trigger hits this firing pin.
He touches it. Fire here on touch It seems so. Due to fire, this gas rapidly Comes out. gas escapes rapidly So this bullet goes forward.
When the bullet moves forward, Newton It is said that every action has a reaction.
For every action there is a reaction. That's why This AK-47 gives a jolt due to reaction Are. So our next question is The physical quantity is written. Very basic There is a question. Too basic. Let's take this Answer everyone.
Answer this.
Option A Physical quantity times its unit Numerical value. Option B: Physical quantity Equal numerical value times unit option C. Physical quantity equals mass plus time Option D: Physical quantity equals length divided by time So dear children, the answer is B Physical amount equal to numerical value times unit You understand this, whatever you do in physics Physical quantities such as length I said that the length of this board is Suppose 10 meters, then this 10 is is a numerical value and this meter is Is a unit. So any physical quantity To write it, first find its numerical value.
The value is written and then the unit is written.
Is. These are our fixed rules.
Let's start the next question. Original How many units are there? How many basic units Are there? So tell me children its answer option A. 5 option B. Two option C. Three more options 5 2 7 3 and seven from D, tell me its answer Its answer is option D, the fundamental unit which is We have seven. How many basic units Are there? Seven. Now the basic units are only seven.
Why do they happen? Why not more?
Ok? So for this, let us understand that the whole When scientists from all over the world gathered in one place And they asked if we had any items.
How many qualities do we appreciate in others?
Cannot be told with help. So he He said that we have seven such qualities which We cannot tell with the help of other zodiac signs.
Can. So those seven physical quantities We called them the basic physical quantities and We call this unit the fundamental unit. Let us go Let's start the next question. surge What is the SI unit of? Option A Volt, Option B Joule, Option C Kalam and Option D. Newton. So the answer is children Option C Kalam. What is passion? surge It is a quality inherent in an object. Any It is a quality inherent in an object due to which it exerts a force on another object. of that quality We named it Aavish. Now how is this charge arise from? I have to tell you that.
Next question.
How many laws of motion were given by Newton?
Tell me children.
Tell me darling, option A one, option B two, Option C three and option D four. So Newton gave three laws of motion. which ones There are three rules? So understand the first law of inertia.
Rule. Law of inertia. The second law that forces Gives the definition of the law of force. And third The law is the law of action and reaction Is. Action reaction rule.
Action reaction rule. So Newton Three laws of motion were given. Remember the three Yes to you. Which is the first one? which is the second Is? And which is the third one? memorize in order Are. Next question.
What is the direct distance between two points called?
goes? Tell me my darlings.
Option A. Speed, Option B. Velocity, Option C: Displacement Option D Distance.
So its answer is option C displacement. Two What do we call the direct distance between points?
Do you speak? The direct distance is called displacement.
Are.
What is a move? The trick is Distance divided by time. Distance divided by time. what is velocity It happens? Velocity is displacement divided by time.
displacement divided by time.
And I have told you about the displacement. what would the distance be Is? Distance is the length of the route traveled.
This is one way. The length of this route is also What do you say? distance. This is also a way.
What is this also? distance. So next This is my question.
How many colours are there in sunlight?
The sweetest answer and the sweetest question These. Tell me the answer to this.
Option A is five, Option B is six, Option C is seven And option D eight. So Lado is the answer to this Seven. There are only seven basic physical quantities. Seven These are the basic units and in seven light only There are colours. If you like the class, Press and share this and like it. This which The subscribe button is visible, its neck You grind it. Starting the next question Are.
Who gave the idea about the particle nature of light?
Did you tell me? These are very variant questions.
Tell me the answer to this, son.
First answer option: Hazan, it is also called ugliness.
Are. Newton second, Maxwell third and The fourth Einstein. So the answer to this question is Newton. Newton was the first to say that Light comes in the form of particles. of the particle Form means it comes like a ball. Look at this The phenomenon of reflection occurred like this. From here She collided and went away like this. So looking at this incident Newton said what is light?
Light is a particle. light as a particle Comes. Then people said that if Prakash If it comes in the form of a particle, then the particle comes straight.
Is. If it comes directly, the light spreads throughout the room.
How does it spread? Then this of Newton Questions were raised on the theory which were answered Haje. Heisen writes like this, son. it This is an English translation. Hazen In Hindi we call it Hazen.
In English it is called Hazen.
Huygens said that light There is a wave. What is light? Light is a wave.
And what kind of wave? the way you If you throw a stone into water, it will dissolve with the stone The waves that are formed, they ripple in all directions.
It spreads. It spreads in all directions She goes. Similarly, light is also a wave.
Is. There is a wave that spreads in all directions.
So what happens in the whole room? lights it occurs. People understood this and He also experimented and showed that Look, light is a wave. after that Maxwell came. Maxwell said that light It is not just a wave. photoelectric is a magnetic wave. What is light? Electricity Magnetic wave. Electromagnetic wave.
Light is an electromagnetic wave.
Ok? Then Einstein. Einstein. Einstein What did he say? Einstein said that light Okay, it is a wave and it is also a light particle.
wrapped them both up and gave them a name Photon. What name did you give? photon light What is there is a photon. Now what is a photon? That A photon is a bundle of waves.
It has happened. When it falls somewhere, it bursts.
behaves as a wave at that time and when this bundle falls on someone And it comes back at that time as a particle behaves like. So this same Einstein Because today we call light that Light has a dual nature. Light has both natures. i.e. light particles It is also there and light is also a wave. Next Question Why does a diamond shine? The easiest question Is. Everyone should come.
Why does a diamond shine? Option A is for reflection Reason, Option B Due to refraction, Option C Causes and options of total internal reflection D. Due to scatter. So our answer is Option C: Due to total internal reflection.
Which reflection due to reflection? full It is important to write about internal reflection. full What is the condition for internal reflection? Listen.
The condition for total internal reflection is that A ray of light passes from a denser medium to a rarer medium I should go to.
should move from a denser medium to a rarer medium and return back to the same medium Needed We call this event complete.
Internal reflection.
Ok? So let's read the next question.
We.
What type of quantity is magnetic field?
Option A is a scalar quantity, Option B is a vector quantity, Option C is the principal amount and Option D is the derivative Amount. So the answer is magnetic field.
is a vector quantity. Now what is a vector quantity? This Understand it well. We have studied physics created some physical quantities and explained those physical quantities.
While preparing the amounts, it was kept in mind that along with the magnitude to tell whom Direction is also required.
So listen carefully. How did we define vectors Fixed the.
quantities which are physical quantities physical We divided those physical quantities into quantities on the basis of direction on the basis of which direction physical quantities that are used to describe direction is needed if not If you tell me, the work will go wrong, then that amount Those which are told on the basis of direction The quantity is a vector One is a vector quantity and the other is a scalar quantity.
That is, two physical quantities based on direction It is of a type. Vector and scalar quantities Amount. A vector quantity is one which has magnitude as well as the magnitude as well as the direction of There is a need. It is called a vector quantity Are. And a scalar quantity has only magnitude.
It happens. which type? Listen carefully.
There is a car here. moat around it Is. This is a road and there is a car here and It got spoiled. Its driver got down here and I saw that there were people standing nearby and there was one here.
One is here, one is here. it said What should people put on their vehicles? Apply force.
Son, what is strength called? Today in simple language understand. pushing or pulling something This is what we call force in physics. So people started pushing and pulling on it Did. A man came and pushed me straight away.
There is a ditch on this side and that side. If it falls down There will be loss. So that's why some things like There are those who need direction to tell There is a need. We call it a vector quantity Are. Here you have to apply force.
I will have to tell you which side to put it on.
Is. So here we need the direction of force and our In which direction the force is to be applied. Therefore, the force What kind of zodiac sign is it? Force is a vector quantity. Correct Is? Similarly, what is the magnetic field?
Is? is a vector quantity. Now my question is that How many vector quantities are there in physics?
Are?
Tell us this in the comments. And the second question is physical.
How many scalar quantities are there in science?
Press and like, sons.
The next question is what is the escape velocity of the Earth?
It happens?
Earth's escape velocity Option A 7.9 Second Option B 9.8 km per kilometer But Second Option C 11.2 km on seconds and Option D 12.5 km per second. So its Answer is Option C 11.2 km. per second.
Now what is escape velocity? escape velocity we The minimum velocity at which to place an object on the Earth's surface The velocity with which an object hits the Earth's surface If you throw it upwards, it will not return.
It comes. We call that velocity escape velocity.
Did you understand? then escape velocity is the minimum velocity Is.
Minimum velocity is the minimum velocity with which a If you throw an object up, it comes back down.
I don't know. Even if the velocity is greater than this The escape velocity will be. Do you understand? So Is escape velocity a vector or a scalar quantity?
Please answer this in the comments.
Next question. The density of water is the highest At what temperature does it occur? Option A: 0 degrees Centigrade, Option B 4 degrees Centigrade, Option C 10 degrees Centigrade and Option D 100 degrees Centigrade. So the answer is 4 degrees.
Centigrade. We took water and the properties of this water Studied the. Water is different behaves differently depending on the temperature Is. Water is a very dangerous thing in this world.
Ok? When we observed its behavior When we kept the temperature at 0 degrees, water was visible.
In your snow form.
When we kept the temperature at 4 degrees, the water The density was the highest.
Nothing at 10°C and 100°C What is water at degrees Celsius?
It boils and turns into steam.
Ok? So this is 4 degrees Celsius.
On which the density of water is higher. What does it mean What is? that if the density of water is kept at 4 degrees So that will fit in most of any vessel.
Do you understand? as if written on a paint roll It happens that 743 density equals 743 this means that 1 meter long, 1 meter high and 1 meter wide If you take any one vessel, it will have 743 Litre petrol will arrive. This is the density means 1 meter length, 1 meter width And how much water is filled in 1 meter height?
Yes, that is its density. how much fluid goes away, that is its density.
Let us start the next question now.
Find out which of the following is a scalar quantity Is? This is a very silly question. leaving a comment Tell him.
See Option A. Velocity, Option B. Force, Option C.
displacement and Option D mass. So its The answer is mass. What is mass? One is a scalar quantity. Why? then the mass of Meaning is KG. These would all be its units.
Are. We go to the market and we I told the shopkeeper to buy 1 kg for myself.
Give me sugar. So the shopkeeper weighed it and kept it Yellow. He did not ask on which day and which Let me give you the direction. So when the shopkeeper I did not ask in which direction should I give it and told There was no need for it either. He gave me sugar And we didn't suffer any losses. In other words There was no need to tell the direction. So So what is this amount? So this scalar The amount is. Next question.
What is frequency measured in?
What is frequency measured in? Option A in Newtons, Option B in Joules, Option C In Hertz and Option D in Watts. So Frequency is measured in hertz. Now The question is what is the frequency?
Listen carefully. if any object if any The object is moving in a circular path So how many times will they stay at the same point at the same place?
Comes back in time. the same time period Let's say. In Marwari we say that When will it come back? Did you understand anything? No Listen to complete one round What is frequency measured in? Hertz In. Ok? Now the object is in its entirety The time it takes to complete one revolution is What do we call it? That's what we call it are the periodic periods and the reverse of the same recurring. Ok? Now look at the next question.
What is the substance with the highest viscosity?
This is a very good question.
Option A: Water, Option B: Air, Option C: Honey and Option D. Glycerin. So tell me the answer to this.
The answer is not honey. The answer to this is Glycerine. If we mix honey and glycerin If compared, the highest viscosity is It is made of glycerin. What is called viscosity?
Thickness is called viscosity. Any How dense the substance is, we can tell it from physics.
It is called viscosity.
Ok?
Next question.
Which of the following is not a type of velocity Is?
Which is not a type of velocity? Option A Equal velocity, Option B. Unequal velocity, Option C.
Average velocity and Option D density velocity. Its then The option itself is absolutely stupid. So this happened.
What is this? This is not a velocity type.
There is also equal velocity and non-uniform velocity.
There is also an average velocity and an escape velocity.
There is also velocity which is a different topic.
Ok? It's all velocity. Well all of these What is the unit?
Whether the unit is equal or non-equal velocity Be it average velocity or escape velocity. all of these What is the unit of? Tell the units of these What is? The units of velocity are these are units of. And what is the unit of velocity?
It happens? Velocity is displacement divided by time.
displacement divided by time.
What is displacement? Straight distance. distance We measure time in meters and time in are in seconds. So meter by second is Is a unit.
Ok? Next question. kinematics of the object What is the sum of energy and potential energy?
It is said?
Look, the first option is heat energy, option B.
Mechanical energy, Option C Electrical energy and Option D chemical energy. So the answer to this is the mechanical energy.
What do we call mechanical energy?
mechanical energy, kinetic energy plus potential The sum of energy is called. kinetic energy, Kinetic energy plus potential energy. Its totals is called mechanical energy. Now the dynamic What is energy? and potential energy What happens? You should read this. Next Question.
Who discovered gravity?
This discovery of gravity is not just a discovery Is. This is the entire science of today.
Tell me the answer to this. Option A Einstein, Option B. Newton, Option C. Galileo and Option D.
Aristotle. So we all know that Who discovered gravity?
Gravity was discovered by Newton.
Newton discovered gravity.
What did Einstein talk about?
Einstein stated that energy E = mc Square about the relationship between energy and mass I had told you. What did Galileo say?
Galileo was the first to say that The Earth that revolves around the Sun It is not that the sun revolves around the earth Is. That is why Galileo was punished.
Earlier there used to be monarchy. The king used to say Look, the sun is revolving around the earth.
Is. But what Galileo said was that the Earth is revolving around the sun. people He said, look, the king is telling us that in the morning The sun is here and look at the evening here Done. You are the sun and you roam around, where is the earth?
did you roam? What did you say to Galileo because of this?
Went? The punishment was given. Now you know what What is rotating and what is not rotating. So Sir, my mind is spinning. Let's move forward Let's see.
What is the source of the Sun's energy? Sun Has a lot of energy. of that energy What is the source?
So listen to its option. Chemical reaction.
There is some chemical reaction going on inside it.
It will give you energy. Second nuclear fusion, third nuclear fission and Fourth combustion process. So the answer is nuclear.
Salyan. Nuclear fusion.
Ok? Now let's look ahead. nuclear fusion What happens? in which the nuclei are small the nuclei of atoms fuse to form a larger nucleus Make it. It is called nuclear fusion.
Salayan means joining. when things connect It is when things connect. Look at this, this one There is a nucleus. This is a second nucleus. it collided Connected by doing. What would have happened if it had been connected?
Is? some of its mass this part mass Whatever is there disappears. by disappearing Where does it go? So brother Einstein came.
Wait a minute. e = mc squared converted to energy This month is passing. So give yourself energy It is obtained from the sun. Do you understand?
Next question.
What is the main function of a fuse wire? fuse What is the main function of wire? Option A Increasing the electric current. Option B: Electricity Reducing the current, Option C when the current is high Break the circuit and light the Option D bulb.
So the answer to this is very cute. More Breaking the circuit when there is current. fuse wire What happens? There is main current here. Here But there is main current. At this place we use some device A thin wire is attached. when at home If there is too much electricity, it becomes thin.
The wire breaks. Due to which the household appliances They are saved from getting spoiled. That's why we Use fuse wire. Very basic The question is. Next question.
If so, that's a very sweet question. If the elephant's The hair of the tail and the hair of the mustache of a man are the Earth But if it is dropped, who will reach first? throw Why do you hit me? Answer this with all your heart.
Tell me the answer to this.
You are giving the correct answer to this. Both Together. Why do the two come together?
Because what on earth does one put this on?
Gravitational acceleration. and what would be its formula Is? Tell.
I won't tell you because the next question will come.
Here is its formula. Ok? Until then you think Take. See the next question.
Two resistances 2 ohms and 3 ohms are in series Are connected. know their equivalent resistance Do it. Now what is their equivalent resistance?
Tell. The answer will come directly. So Tell me what is the answer?
Its answer is option C. How to remove it?
Look at the hierarchy, that hierarchy In The equivalent resistance in series which we write as R equivalent What is R1 + R 2? Two more R2s How much is it? Three. What is two and three?
Five. And what is its unit? Om. So this Which of our five answers are there? In C. Now What is the formula in parallel order? They Let me tell you. If only two If there is resistance then what is the formula for parallel sequence Is? 1 / r equivalent = 1 / r1 +1 / r2 This is the equivalent resistance in parallel.
Of order.
Ok? Let's see the next question.
This is a very good question.
If you do not understand the concepts then try this question.
I will just take a chance.
Ok? So what is the question? Look at the period What is the relation between speed and oscillatory motion? Option A. Both have the same speed. Option B Each Oscillatory motion is periodic motion. Option C Every periodic motion is an oscillatory motion.
Option D: There is no relation between the two. So Its answer is B. Each oscillatory motion has a period There is movement. Now what is oscillatory motion?
See Oscillatory motion.
Oscillatory motion What type of motion did we name kept? Oscillatory motion. If an object is the same If the place moves left and right here and there, then that We call this motion oscillatory motion. what do you say Are? Oscillatory motion. Like there is a swing. Swing This situation of his goes here and there.
So what is the speed of this swing? of the swing The motion that occurred was oscillatory motion. Which speed?
Oscillatory motion. What is the speed of such a pendulum?
it occurs?
What is a pendulum? This should come to you.
As soon as the pendulum said what kind of photo of it It happens, you should understand it. So The motion of a pendulum is also an oscillatory motion.
So sir, what is called periodic motion? periodic motion Son, the speed that is taking place on the circular path We named the motion periodic motion. Ok?
Next question. foremost in the eye and What are the parts located at the back?
Option A: Retina and cornea. Option B: Cornea and Retina Option C Aris and pupil option D lens and cornea its The answer is cornea and retina.
It is at the front of our eye. Whereas retina which is while the retina which is our eye It is the most posterior part of the. light on which What happens if it falls? current would be generated And the current is in its small pieces The eyes have nerves, the pulse of those nerves With the help of that current which is in our brain and because of which our brain The image is created in. Do you understand?
Now look at the next question.
In what order are electrical fittings done in houses?
She goes? Option A. Rank order, Option B.
Side order, Option C Mixed order and Option D Circular sequence. tell me the answer to this Son.
Tell me the answer to this.
No one has answered this yet.
The answer to this is lateral order. side order This is what we call parallel order. parallel Order. Lateral order is also called parallel order.
They say. So fitting in houses parallel order It is done in. Why is it done?
Because in parallel the voltage There is no change. Like a light bulb it burns Similarly, another bulb will light up. Dum or It will not burn at high speed. That's why Fitting of houses is done in parallel order Is. Now how to fit the house in parallel order We do? Understand a little. This is a pole and There are two wires coming from this pole and going to our house.
This is the meter. There are four parts in a meter Are. Like this one, two, three and four. written on one It happens that P means fuzz. was written in the second It is neutral. Sorry neutral. and another one here Also fuzz and neutral. What do we do? One We bring the wire from here and put it in it.
We give. Then they bring a wire and from wire And we put it in. Then this wire It is connected to this and what it is is related to this Is connected. So what do we take from Fuzz then?
Are you coming? Let me bring a wire. And What do we bring from neutral also?
We also bring wires from neutral.
This way. Then we have to put a bulb here.
So in that bulb, this one which is neutral, Let's cut a little bit from here. a wire Let's put it here. Then from this What do we do? Comes with a wire We put a switch below and with the switch we Do you take back the wire that was installed here?
We give. So by switching on and off this bulb It gets burnt. This is how we do the fitting further live. See the next question.
On which principle are the wings of an airplane based?
Is? If you tell me the answer to this, I will believe that your The preparation is excellent. aircraft wings On what principle does it work? Option A Pascal's principle, Option B Archimedes Option C is Bernoulli's principle Principles and Options D. Newton's Principle.
Tell me the answer to this.
Comment.
No, wrong answer. Option A is the wrong answer Option C: Bernoulli's principle is very cute.
There is a principle. Bernoulli's principle What do aircraft do according to his wings Are made. Airplanes move. Now What is Pascal's law? Pascal said that if you apply pressure on an object, it The pressure spreads in the same direction everywhere.
Everyone starts moving in the same direction Is. What does Archimedes say? Archimedes It says that this ocean in There are big ships, why do they float?
Whereas the needle sinks in it. it Describes the buoyant force.
Whose?
Describes the buoyant force. Then Bernoulli, I told you about Newton Newton's theory is very important in physics.
It is in place. Newton considered the particle motion of light Explained the nature. Newton's theory of gravity Gave the rule. Newton gave the laws of force.
Who knows what all Newton gave.
This is not a recorded class, son. Who speaks Has it been recorded? Manish How is it recorded? I will recite some poetry To you? Look ahead. to the lawn mower It is pulled rather than pushed.
Because Option A. Friction force increases.
Option B The friction force decreases. Option C increases the weight of the machine and Option D It decreases. The velocity decreases.
Tell me the answer to this and to tell me the answer to this You should understand its concept. Otherwise you you will hit me And its concept is very good.
It cannot be explained in a small class.
Tell me the answer to this question.
Which one is this? Shubhu Shubhu, this is the correct answer. the frictional force is reduced goes. How does the frictional force decrease?
How is frictional force applied? I call this I will tell you here at the end of the video.
Otherwise it will consume a lot of time. So the answer to this What is? The friction force decreases. next See. A passenger sitting in a moving train Why are plants growing backwards?
appear to? Option A is due to gravity.
Reason, Option B Due to inertia, Option C due to relative motion and option D due to friction Reason. Tell me the answer to this. So the answer to this is Everyone knows. Because of relative speed.
What do you do in relative motion? We who An ant is moving at the same speed as the object Let's sit down and see which one Where do things go? Ok? very nice It is a concept. So the relative speed is that one object is moving and the other object is is also moving. We sat in one of the They are there and looking at the other.
What have we been sitting in? sitting on the train Are. Here is the train. We are sitting on the train And looking at the other one. So this speed How is it? Relative speed. It is understandable Sir? Sir, this class will continue for a while.
Okay, let's listen to this. As long as it's going on Till then listen to this. speed of sound In which does it occur the most? answering it Needed These are the questions that came in the exam.
In which is the speed of sound the highest?
So the answer to this is Lalla C. In solid. Solid The speed of sound is highest in Then who has less than that? In the liquid.
And which one has the least? In gas.
Sound does not travel in a vacuum. sound A medium is required for movement.
Sound travels from one place to another. His A medium is needed for this. what light Does the medium needed for the motion of?
Comment on this.
Next. More in such current and DC current Which one is dangerous? Option A: Such Section Option B. DC Section Option C. Both Same Option D nobody see such a current And the evil current is the highest of the two.
Who is dangerous Say such current and evil current these evil Tell me who is the most dangerous in the current?
Brother, the answer to this No one has answered this correctly yet.
If a child is giving then the correct option is option A.
What is A? The correct answer is DC current Direct current is what we lovingly call evil.
They say current. This evil current is not evil.
Is. Just like life gives pain.
Death has become infamous just like that. same This type of evil stream should be infamous like this.
It is kept. Who gives trouble? such a stream Gives. Ok? Next question.
More on wearing black clothes in summer It feels hot. while wearing white clothes Why does it seem less? Its answer option tells Am. Two answers to this: Black is the color of heat.
It is a good absorbent. Option B: White colour It is a good absorber of heat. Option C Black color reflects heat and Option D: White colour absorbs heat.
Is. So the answer is black colour represents heat.
It is a good absorbent. Son, we are physics What do I study? We study physics are the properties of objects. what about which item Is it a quality? We name that quality and We remember that name.
So this property of absorption is the highest What item is it from? So the answer is black object Of. Ok? Next question start We do. Just wait a minute. Numerical Is coming. stars twinkling at night Why do they appear to be happening? quite basic The question is. Option A: Earth's rotation Reason: Option B is the reflection of light in the atmosphere.
Due to refraction, Option C reflects the reflection of stars.
Due to change in intensity of light, option D. Due to the light of the moon. So its The answer is option B. Light in the atmosphere Due to refraction. due to the rotation of the Earth So what do you make? I prepare it day and night, brother.
What are they made of? Day becomes night. Balance These are useless things. Ok? Look ahead.
of a freely falling object What is the initial velocity? Very good There is a question and many wrong answers to it.
Will also give. Tell me the answer to this.
Option A 1 meter per second, Option B 5 meters per second, Option C 9.8 metres per second and Option D 0 meters per second.
So the answer is option D at 0 meters Seconds. I have one item here.
Ok? What do I do now? this object I will remove my hand from here. So this automatically It will fall. So I gave it some speed.
Had given. Zero was the initial velocity. So of a freely falling object What is the initial velocity? would have been zero Is. Ok? See next.
An object is thrown vertically upwards goes. Here's an item from here thrown vertically upwards. Even Threw it away. If he jumps to a height of 10 m It reaches. What is this height? 10 meters.
Find the velocity with which the object is lifted was thrown? Now we know that from above If you release, no velocity is required.
Is. It comes straight down. If the Earth throwing an object from below the surface of If it is there then some momentum will have to be given. He I have asked about the speed brother. Tell me the answer to this brother.
Tell me quickly. Calculate its answer.
Although its answer should come.
So the answer is 14 meters per second.
Look what happened We have a formula for speed v square equals u square + 2as Sir, why did you feel this way because the height here Given height means displacement, so this is fine.
is the initial velocity you asked for so here it is and 10 The meter went higher than this, it did not go higher than this What does this mean its final velocity was? Zero.
So this is also given. And the one who is going up Which object is on the moving object or the object coming down?
Feel the acceleration? So the acceleration due to gravity is Yes sir. Whose value we know is 9.8. Now Because the object is going up. g feeling down If it is there then how will you feel? -9.8 seconds per meter. So keep your respect. v square How much? 0 u square yourself to remove.
Plus okay? what is this plus 2 instead of a -9.8 9.8 and s is what we call the height Has occurred? 10 meters, so write 10 here now.
Look, 0 equals u squared minus and plus What happened? Minus. Ok? Two to 9.8 If you multiply it, it becomes 98 sorry, how much is it?
Forest And put 196 points on it, multiply it by 10.
do it. If you multiply this by 10, you have What answer will come? 196 okay? Zero here Move u² this way 196 That's it. So How much will you get? u will come 196 inside root and its square root is 14 seconds per meter. So 14 meters per second If you throw an object, it will become more It can go more than 10 meters high. This way You should have questions.
What is the rest of it? small little There are theories. These are children's questions.
Such questions are asked in selection. Free A falling object experiences weightlessness Why is it in this state? adorable There is a question.
adorable. Tell me the answer to this.
A freely falling object experiences weightlessness Why is it in this state? Tell me brother about it Option A Its mass becomes zero.
Option B: There is no gravitational force on it.
It seems. Option C Normal reaction to it The force is zero. Option D: His weight It ends. So the answer is option c. The normal reaction force on it is zero goes. How do you measure weight? measuring weight It is from a machine. This machinery. Ok? This Assume on the machine An object weighing 10 kg is kept. So on this How much force will the Earth exert? Earth Force Will apply. The force f is equal to m and a the force of the earth is the acceleration is the acceleration due to gravity. So how much is it? 10 10 So now we have m and gravitational force Acceleration g. The value of g is 9.8, which we can calculate as Sometimes I even write 10 with love. So 10 * How much is 10? 100 and because the force is The unit of force is Newton. Ok? And What did we call this force? Wet. Because The earth is applying force The earth is applying force We call that force weight.
Let's say. Ok? So the weight of this object How much is it? 100 Newtons. What will happen now There is a machine here to measure weight.
And on top of this, this 10 kg container is kept.
and left both. both together It is falling. So this earth below it It is pulling to the side. Ok? this too below Pulling to the side. This machine has the upper part I am not applying side force because the contact He is not suppressed. That is, the reaction The force which is the weight of this earth is the weight force.
The upwards side of the reaction always seems to be This force will not be applied to the reaction force.
Because both are falling at the same speed.
Therefore, one object touches another object.
There is no I am not suppressing it, so what is it that This is a state of weightlessness. Ok? Now See ahead.
If the mass of an object is 10 kg, then What will be its weight on the surface of the earth? Now!
Told just immediately. What is the answer to this?
D. No son, check this first. Its There is no answer. What is the answer to this? 98 What is the weight f equal to? f equals m a It happens. the same force that the Earth exerts We have named it Bhar Weight. how much is that Will you go? M. What would be the acceleration of the Earth Is? Yes. How much is M? 10 acceleration due to gravity What is the correct value of g? at 9.8 meters Seconds. So instead of this, write 9.8 meters.
Seconds. So how much is it? 9.8 out of 10 Multiply it to 98 Newtons. So the correct answer is is 98 Newtons. Don't do this. This is us Sometimes calculations are done with love To do good to. 9.8 replaced by 10 Let's take it.
Ok? Now look ahead.
Hello, please pay some attention. Ball Pen Kiss Works on principle? tell me the answer to this And I give you this homework. Its Tell me the answer. On which principle does the ball pen work?
Does it? Ok? Look next. weightlessness What are the risks to astronauts due to Are you facing difficulties? Now Weightlessness is not a good thing. Ok No? facing many problems due to this Have to do it. Tell me which of these The problem faced is space To the passenger?
Watch Option A object start floating. Option B. The balance of the body is disturbed. Option C. Difficulties in swallowing food. And Option D All of the above. So the answer is All of the above. If a state of weightlessness occurs If it goes then you must have seen sometime that this These monkeys go to the moon in aeroplanes.
Ok? So the passengers who are in it should go They are flying like this at each other To. They face great difficulty in eating.
How does the problem arise in eating that food gets into the mouth?
Where does it go from? Here till new moon. Correct Is? If he ate here, he would eat here below.
Who will bring it? The Earth brings mg by pulling it Because of. It will not work at all. lay here There will be food. So there is a problem in eating food also.
He has it. Ok? next question See.
By doubling the distance between the two masses Gave. The gravitational force between them will be. Don't take a chance. not a fluke Have to kill. Whatever answer he gives in Physics Yes, is it in Physics? in Physics Physical quantities What are physical quantities?
Are? Which can be measured. If the one to If it can be measured, then measure it and tell me everything.
Why are you guessing? So the answer to this Tell.
Tell me the answer to this, children.
The A option will remain unchanged. Option B is a It will become a quarter. Option C will be halved and Option D will double.
Look, the answer to this is two things. There is an object whose mass is m1 and the other object is whose mass is m2 between their centres What is the distance of suppose to be? r then above these The gravitational force that Newton observed Told that this looks like GM1 m2 / r² it seems. Now take the first value r How much was it? Firstly, how much force was being applied earlier?
The force applied earlier was gm1 m2 b.
Square, how much will it be? f be will go gm1 m2 what are you doing now? Double this r Are doing. Two are doing it. So the new thing See. What is f equal to? f = gm1 m2 / r² What is the value of r? Two. Correct Is? Square of 2. So what is f equal to?
Went? g1 What is the square of m2 by 2? Four. These What should I write in place of gm1 m2?
Should I give? First this later force. So f d jo What did that f over come to me? Four.
That means the force will become one-fourth. one fourth Will be done.
So what is the answer to this? Option B is one fourth Will go. Look next.
The acceleration due to gravity on the Moon is is less in comparison. So on the moon Remember the weight of an object The acceleration due to gravity on the Moon is What happens when compared to the Earth? would have reduced Is. Ok? What will be the weight of the object?
It will be equal to the Earth there. of the earth It will double. will be less than the weight of the Earth and will be zero. Tell me its options.
Its option is son, less than the weight of the earth will be. will be less than the weight of the Earth. what is the load It happens? Weight is equal to force Is. And the weight that the earth exerts, the force that the earth exerts Whatever is imposed, we call it burden. that's it will go mg. g is higher on Earth and What is g on the moon? It decreases.
Therefore the weight will also be less on the Moon. Now Listen, if an object weighing 1 kg is on the moon If yes, then how many kg will it weigh on Earth?
Brother? It will be of only one kg on Earth also.
If the weight of an object is on the moon, How much is it? If it is 60 kg, then its weight on the earth How much will the weight be? its weight on the earth It will be more than 60 kg. about six times Is greater. So multiply 60 by six.
Take. 36 will become 360 Newtons of weight. Burden Varies on Earth and the Moon. Mass Doesn't change. Remember this.
Listen to the next question.
of the universal gravitational constant G What does the value depend on? I just had a Force was told. gm12 / R² m1 is the mass. m2 is also mass Is. This g is universal is the gravitational constant. That means everywhere Its value is the same. This means that That it does not depend on anyone.
Okay, right? no matter what the mass Whether it's the Earth here or the Moon here The value of yes will remain the same, but whether here or not But there is a golden ball And here even if there is a silver ball, So what will be the value, the value of g will remain the same It will remain the same, it will not make any difference ok now let's read in hindi ok one The bus is travelling in the east direction It is numerical, do this also, easy numerical.
A bus is travelling in the east direction and travels 4 200 km per hour covers the distance. Bus Find the velocity of. What did Lalla ask?
Velocity is asked. What kind of quantity is velocity? vector quantity Is. That means, while telling the answer, you should also tell the direction.
You have it. So let us calculate this.
What is velocity equal to? displacement by Time. displacement divided by time.
What is displacement? What is the straight distance?
200 km Ok? And how much time is there? 4 घंटे.
What is the result if you divide 200 by four? 50 Km per hour. Will the answer come? 50 kilometers per hour. But in which direction?
This is also 50, this is also 50. So in the answer Look what is written in the question? in question It is written in the east direction. So this is in the answer Look at the east side. So the correct answer is This will happen. Don't do this.
Ok. Please reply me.
Look ahead. Very cute cricket player Question. Cricket player taking a catch Why does the hand of time pull back?
Option A To increase gravity.
Option B to increase momentum. Option C To gradually decrease the momentum of the ball For. Option D: To increase friction, Answer me son. If you know the answer to this So don't guess and tell me. It comes only then Narrate.
Look, this brother will now tell the block again.
Calculate its answer brother. So the answer to this is C. Gradually decrease the momentum of the ball Whatever you think of doing in physics Don't think like this just like that. From the formula Let's think. How? See.
A formula for the force that you have It also happens that delta p b delta t That means this is the change in momentum.
changes in And below is the change in time, now look at it.
The man caught here momentum instantly Time became zero, it took a second for it to The hands will be hit hard, the catch was taken here.
It's been a while since I took you down to More. If the time is more, then the part of more If it goes, how will the strength come? Less. then his hands But what force will be applied? It will take less. That's why he What does it do? moves the hand backwards Is.
Do you understand? So what is the answer to this?
Say. To gradually reduce the momentum of the ball For.
Next question. iron ship floats on the surface while the iron sheet sinks Because the color of the ship is different.
The average density of the ship decreases. Option C. The iron sheet is heavy. Option D The water pushes the ship up. Tell We have to answer in the language of physics.
Even if you know something in simple language It might seem like a different option. So the option What is? The average density of the ship decreases Is. The average density decreases. Okay, right?
So this is the answer. Not so water ships does not push up. Okay, right? it There will be no option. No water above the ship Pushes. The water does push.
this question. What is the inertia of an object?
depends on? Option A is for the object at the center of gravity. Option B is for the object on mass, option C on acceleration due to gravity and option D on the size of the object. tell me about it Answer. Everyone is saying its answer is correct.
Option B. On the mass of the object. inertia What happens? Inertia is the inertia of an object To remain in its position. that inertia Is. If something is moving, let it move I like it only. no stopping. So keep it going What is? inertia if something is at rest So he likes to remain still. this name What did we give to? Named inertia. This We named the quality inertia. So inertia depends on what? Inertia dependent on mass. the object of which The greater the mass, the greater its inertia will be greater and the one with less mass, Its inertia will be less. See next 5 kg An object of mass 10 is moving in a straight line moving with an acceleration of metre per second squared Has been. the magnitude of the force acting on the object How much will it be? Calculate this brother. Its Tell me which option will it be? Option A 50 Newton, Option B 0.5 Newton, Option C 0 Newton and Option D 2 Newton. tell me about it Answer.
Tell me the answer to this.
So look at its answer.
The formula for force is force Equals mass times acceleration. Mass What is? The mass is 5 kg. Sir how Identify the mass as 5 kg. So whose unit is in kg There is mass. It is written here also that has mass. acceleration acceleration what Is? The acceleration is 10 meters.
But second square will be the answer.
Tell me how much, say 50, 10 and 5 kilograms meter per second square sir this is an option If it is not there in the option then Remember this, we can think of this thing like Newton.
If we call it Newton then it is Gaya Newton So here it is in the 50 Newton option.
Ok?
The next question is about sound in a vacuum.
What is the velocity? Tell how much is a? Option A 3 lakh Option B 330 meters per second option C Sound does not travel in a vacuum.
Option D None of these. So the vacuum What is its velocity? sound in a vacuum What is the velocity of?
Tell The correct answer is C. Sound in a vacuum Can't hear it.
Next question, the wave in which compression now There will be a lot of questions. Now tell me a wave consisting of compressions and rarefactions what is he called? Your preparation is very It's good son.
Tell me the answer to this. The wave in which compression and Rarefaction is more, it is called CBS The answer to this is son longitudinal wave now How compression and rarefaction occur as we What do you do when you speak, there is sound Which way does sound travel? Sound travels like this.
compression occurs in some part Some have rarefaction. In some part it compression occurs and rarefaction occurs in some Is. I am talking about rarefaction meaning empty space.
between.
Ok? We are talking like this, compression means Compression and cleavage are also taking place in this direction.
Are. So we call this wave longitudinal.
Waves and sound go like this. This is very It's a great concept. In this you always Are you confused about what a transverse wave is?
What is a longitudinal wave?
This is not a confused question. longitudinal wave Let me tell you. listen longitudinal wave The direction of wave propagation in In which direction is the wave traveling?
Direction of transmission okay and here's the object that's making the waves Its direction is always in the same direction. These Look, both are on the same side. catch by volume Take. These two are together. both the same is in the direction.
Ok? I'll pose a question right here. Who Transverse wave is a transverse wave wave propagation in that transverse wave and which The motion of the particle that makes the wave There is a 90 degree angle between the motions. wave So it flows like this and the particle moves like this. it Where does it happen? This tower, which is What happens in the tower? Electron Ace move, causing waves to emerge and The same waves are present in our homes in the form of a network.
It comes in.
Next echo to hear the echo How long does it take for sound to reach our ears?
Should I arrive later? Option A 0.1 sec, Option B 0.5 sec, Option C 1 sec and Option D 2 sec. This is a rote question. 0.1 Seconds. 0.1 second.
Next Veg u Veg wavenumber u is between lambd and periodic v what is the relationship? Tell me in this option Tell This is this velocity, tell me what is there in it? So I Let me tell you what velocity is to it? velocity It is equal to displacement divided by time. displacement Bata Time.
The wave is formed something like this.
This distance is a straight distance. This we displacement and the displacement is called wave We gave a special name to displacement in Wavelength lambda. This is the distance. So this Done lambda. How much time? Time from here The time it took for the wave to reach here We said it's okay, so the velocity is achieved.
We have u = lamλ / t so as t So no, what is the periodicity?
what is the time period that one revolution The time taken to complete is the time period.
Now look at this 1 / t which is 1 / t times this lambda this 1/t is what we write as μ What is written μ lλ = v This is the answer to it. So which one is it? This is the option A. Ok?
The correct answer is Sumit Kumar.
Next. If the speed of a wave is 350 m/s per second and wavelength is 50 cm. Is So what will be its frequency? from the same formula It will be calculated as I have just told you.
Look, tell me the answer to this. Calculate a little Like.
The answer is C. How did you come? Look, we What have you asked? The frequency is asked. So we First of all velocity equals same time. See displacement by displacement divided by time. Velocity equals displacement / Time. Ok? Velocity equal.
Ok? What do you write for displacement?
Lambda. What do you write for time? t. So 1 / What do we write for the one that is t? μ frequency and this is lambda this is Velocity. So what did we ask? Its frequency is If you have asked, what will happen? This μ is equal to There will be speed. We write velocity as v/ Lambda. Now look at this question, this question What is the velocity v in it? 350 seconds per meter. And what is lambda here?
Is? This is in centimeters. In which one is it?
In centimeters. And what is going on here?
Things? In meters. Both are classified according to the SI system.
I will have to change it. This is in the SI system Is. This will have to be changed. which is 50 centimeters If we convert it into a meter then How much will it be? Will divide it by 100.
0.50 meter. This will happen. So write it here 0.50 meter. If you remove this point, how many Will it take? Two zeros. One zero to one zero cut and five divided by 35 is two so 7 * 5 35 700 and the unit of frequency is That is Hertz, so this is the answer.
That's it, so you remember the formula.
Even if you don't remember how Come, you can take it out See further Option A: The unit of power of a lens is meter.
Option B Diopter Option C Joule and Option D om so the answer is B diopter. Lens the ability which we call power In English it is written with P.
Inverse focus of a lens. Okay, right?
Now look at the lens which has the highest focus.
If it happens then its power will be the least. Because If more is divided into one then the value will be less.
Will come. Remember this thing. meter is the unit of It happens? Meter is a unit of length.
Diopter is the power of the lens. Joule of What is the unit? Of work. Om whose What is the unit? Whose resistance of resistance Next look at total internal reflection I have already explained what causes the incident.
Given that it is probably the absorption of light, option B The angle of incidence exceeds the critical angle Option C: No refraction of light D mirror surface Tell me what is the answer to this, so the answer is Option B: Angle of incidence greater than the critical angle To be. Now what is the critical angle?
Listen. First of all, remember that complete What is the condition for internal reflection?
The condition is that the ray is passing through a denser medium.
It is going from denser medium to rarer medium Needed Ok? And it was going and coming back.
Returned to the same medium. That incident we What do you say? Total internal reflection.
This normal. What is this? Normal n. Ok?
That value of the angle of incidence That value of the angle of incidence The value of the angle of incidence due to which The value of the angle of refraction becomes 90°. be 90° That angle is called the critical angle. If If it is incident at an angle greater than this angle then She will come back. Therefore, the complete internal The phenomenon of reflection occurs. Ok?
Look next. direction of magnetic field It is told. This is a very lovely question.
Tell me the answer to this. sini/sinr This is the law of son reflection. sini/sinr Ok? Its ratio comes in μ. Ahead See Walk fast. Let's move fast ahead. wait.
The direction of the magnetic field is given by Option A: By the right thumb rule, Option B Fleming's left hand rule From, option C is the right-hander of Fleming.
From the rule and option D from Ohm's law. So The answer is A Fleming's right hand By the rules. Now left and right, right and left What happens? You should know this. See If there is a wire, the current in that wire is in this direction If it is flowing in me then which is the right hand?
This happened on the right hand side. The thumb of that hand is electric and this one which is bent These are my fingers, those are my magnetic fingers Will indicate the direction of the field. This magnetic The area will be in this direction. Ok? Now What is this Fleming's law? You read this Take.
Electromagnetic flux is defined.
What is electromagnetic flux? So Listen to its options. Option A: In a driver As a flowing current, B is magnetic lines passing through the field Option C in the form of electric potential and option D As resistance. So the answer is magnetic field passing through a region In the form of lines. If magnetic from somewhere The area is passing here like this and we have a beach I placed an area whose What is the area? 1 meter square. So How many lines passed through it? the same magnetic There is flux. How much has passed? Four. So magnetic How much flux? Four. Do you understand? Correct Is? See the next question. If the driver's If the length is doubled then the resistance What impact will it have? There are many questions.
Don't guess, son. Tell. And it is correct So don't tell me the wrong thing. You think that my Correct. Ok? I know it. fluke I try it, but I make a mistake. Not so Have to do it. Tell me the correct answer. Its option A It will be halved. Option B would double.
Option C will quadruple and Option D will There will be no change. Whenever such When questions arise, whom should we think about?
From the formula. Whom to think about? From the formula.
Giving options. Giving option B All the children. So look, the length of the conductor is doubled.
What will be the effect on resistance if this is done?
Will it have to? The resistance doubles.
The resistance is proportional to the length It happens. The resistance is the cross-sectional area which is inversely proportional to the area of It happens. If we write both of these, it will will be proportional to l/a if we take the proportional If we remove the sign of then a constant comes.
Ok? This is what we call resistance.
What do you say? Resistance. Now I have further questions about resistivity.
I have brought it with me, so I will explain it there.
Next question. If the length of the conductor What will happen to the resistance if it is doubled?
Will it have any impact? Tell him brother. Both There are different questions. previous question What impact was it having on the resistance?
What about resistivity in this question?
Is there any effect? Tell.
So listen to the options. The resistance will increase. of The resistivity will decrease. no effect and D becomes zero, then any Will not have any effect. the resistance that It is a property of matter. We have little substance Changed it. The substance is the same, so The resistance will not change.
What was the resistance? It was constant, right?
What does constant mean? Stay the same. That Stick to the substance.
Ok? Now listen further. King of Physics.
Thank you son. Look ahead. Right now is the time Not there. Otherwise I would have taught it in such a way that everyone Everyone would become physical Baba. resistivity dependent on which of the following Does it? what does resistivity depend on Is? Tell me, I have just told you about the substance.
On nature. It is a property of matter. As What is the resistivity of silver?
Is it more or less? With whom?
From copper, from iron, from these other metals? They You tell me. Ok? I told you the answer to this Gave. Look ahead. moving with a uniform velocity Kinetic energy of the object 2500 joules Is. If its mass is 50 kg, then its Find the velocity, Lalla, move the pen. Tell me the option What will be its velocity? Children speak the answers There have been c. Okay, tell me about the last one.
Answer. Let me calculate it myself.
The formula for kinetic energy is kinetic energy.
We write energy as e. Energy kinetic How to write kinetic energy Are. Its formula is beta 1/2 mv² 1/2 Mass * Square of velocity. Now look at the question Take. How much kinetic energy has been given? 2500 Joule. Write 2500 joules here. This is absolutely math These are the questions of MS Guru. 1/2 How much is m? m given 50 and v square its has to be removed. Just look at this.
Cut this by two. How many times was it cut? 25 times.
Subtract this from 25. How many times was it cut? 100 times.
So who got 100 equal to? v Square. So If we take the square root of both sides, we get 100.
Under root has under root 100 inside it Son 10. And what is the unit of velocity?
seconds per meter. seconds per meter. So the option Which one is it? Here are 10.
Ok Sir? Where are you from? We are from here, son.
If m = 2 kg and v = 3 m/s What will be the kinetic energy? Now tell me this too Two. What will be the kinetic energy? July 6, 9 Joule, 18 Joule and 3 Joule. Tell me which option Correct?
See, the answer to this is the formula for kinetic energy.
has kinetic energy e equal to 1/2 mv² What is given here, please write 2 kg.
1/2 * 2 v how much is 3 here it is sir 3 Square Look Ahead 1/2 * 2 squared of 3 means squared of 3 Write three twice, I have written it sir Two divided by two, how much is 3 * 3? nine.
What is nine, son? energy. unit of energy What happens? Joule. So this is Joule.
The unit of work is also joule. of energy The unit is also joule. Ok? Look ahead.
Option C. Next. law of conservation of energy What does it tell? This is a very lovely question.
adorable. The whole physics rests on this.
Energy is destroyed, energy is created, energy It is neither created nor destroyed. D Energy increases. So everyone knows the answer to this.
Is. Energy is not lost, otherwise It is made. Ok? Now listen. a water The tank is here. Ok? from this tank here But there is a tap installed in the house. More like this I put the utensils here and started washing my hands.
Are. Turned on the broken, turned on the tap And I am washing my hands and I have washed my hands. and which The water that fell collected in it. In this Tell me whether water was wasted in washing hands or not Happened? Tell me how much water was spent in washing hands Didn't it happen? Here it is filled with water.
There was a tank. Ok? tap connected to this tank Was. I opened the tap here. open I did it and washed my hands and the water that fell Collected it in this. Tell me to wash my hands Was the water used or not?
So the answer is that water is not wasted in washing hands.
Happened. The water came here and a little bit Water came into my hands. Ok? So what is the cost Happened? Energy spent.
The energy changed. The energy was up. This time mg As above. Now that energy comes down.
Went. Ok? It reduced.
So this is the law of conservation of energy. Next See. If 20 joules of work is done in 5 seconds What will be the power if it goes? So what is the power?
Will it happen? Option A two watts, Option B four watts, Option C 5 watts, Option D 10 watts. fluke Don't apply it. Anybody who asks in Physics Whom to answer to? From the formula. So the power The formula is P = W/T W/T and W How much is it? 20 joules. How much is it? 20 joules. and T How much is it? 5 seconds. How much is it? 5 seconds. 20 Divide five by two. How much did it cost? 4 joules per second. Now about the power itself Which scientist did more work? Watt did. Therefore, the answer to this is what unit we have Do you write in? Write in watts. So 4 Watt.
Ok? Look next.
The formula for power is W = F * D, B = B option P * W part t. P = V * I and D = both B And C. So the answer is D is a power of both B and C. it Shakti is the power that works for itself. it Shakti is power with its own electric current.
Ok? So you should know these formulas. How It will come later. You just remember Needed I am from Nagaur only sir. Let us go. of the clock What is the time period of the hour hand?
What is the time period of the hour hand of a clock?
Would? Now understand this.
1 hour, 2 hours, 12 hours and none of the.
None of these. Ok? So its Listen to the answer. What is the answer to this? of the clock What is the time period of the hour hand?
So you should know the definition of time period.
What is? The period is one complete cycle the time it takes to do is called the period. to complete a round the same amount of time that is taken in It is called period. Listen to me carefully From. watch-woman The hour hand was here at 12:00. Correct Is? Slowly the sun came and it completed one revolution.
Done it. So how many hours have passed? 12 hours It's over. How many times does it take to complete one revolution?
Hours have passed? 12 hours passed. these 12 hours What is it? Periodicity. So what is the periodicity?
Happened? The time taken to complete one revolution. Now Listen if something If an object in t seconds If an object t in seconds okay? completes a few rounds Is. Suppose anything completes the cycle. So How many revolutions will it complete in 1 second? 1 The number of revolutions completed in a second is called We call it recurring. What do you say?
recurring. The periodicity f equals 1 / t 1 The number of revolutions completed in a second We call that recurring. I understand Is? Now this home light in our India It comes. Its frequency is 50 Hz.
How much is it? 50 Hz. This means that That is, it closes 50 times in 1 second.
And it starts 50 times. So when you Check the camera settings in your phone and the light settings.
If you look at it, it is blinking like this If this happens then what should you do in it, recurring Make it 1/50 shutter then it will be fine Will be done. Look Next The SI unit of power is. Now the power What is SI unit? Watch Shakti's SI The unit is beta watt. Joule work Is of. Newton is of force. This is the scientist's Named after. And Pascal is of pressure.
Whose is Pascal? Pressure. And what about power?
Is? Watt.
Next. number of complete oscillations in 1 second The number is called. Now complete in 1 second What is the number of oscillations called? t It makes one revolution in a second and is called are the periods. and the number of revolutions in 1 second We will complete it and call it recurring. What Will you say? recurring. Hear This is an object. I did this in 10 seconds.
How many rounds did you take in 10 seconds? 20 dizzy. How many rounds did you take? 20 rounds By roaming around. So what is my frequency?
The frequency is answered in 1 second How many rounds do you make? then divide by 10 Two. How much is 20/10? two rounds per Seconds. Two revolutions per second. So the frequency What is the number of revolutions in 1 second?
Do you apply it? That is frequency. So this This is what was asked: the number of complete oscillations in one second What is the number called? So the answer is recurring. What is period? The periodicity is a In completing the circle. to complete a round The time taken is called the time period Are. Ok? I know the trick. amplitude of the wave It happens. It is told in waves. Here See next question. What is a longitudinal wave?
Can it arise in the medium? Option A Solid and gas. Option B: Solids and liquids Option C: Gases and liquids, Option D: Solids, Liquid and gas. So everyone knows the answer to this.
Solid, liquid and gas. which in its longitudinal is a wave, is a sound wave, which of Sound is a wave, it requires a medium it occurs. It cannot operate in a vacuum.
See the next option, son. next question See. the second hand of a clock What is the time period? very cute question Is. adorable. Tell me its option. Which one Correct?
Look, answer this.
What will you read about Marathon GK?
Look at its answer. 1 minute, b 1 hour, c 12 Hours and D 24 Hours. Now watch the clock that the second hand is moving from here Comes back here. He is called a dizzy. And how many seconds does that one round take?
Does she take it? 60 seconds. and watch 60 seconds Are. It is not an option at all. So 60 What do we call seconds? speak for 1 minute Are. So the answer to this is 1 minute. Next longitudinal waves longitudinal waves in which the vibration is in the direction of wave propagation It happens. Is this true, false or Partially true or none of these. it I have already told you. what is the answer to this Is? It is true. Look into longitudinal waves. it Both the unit and this quantity together Is. This quantity and this quantity. remember this Take. What is the meaning of this? This means Wave vibration and propagation are both in one direction.
How does it happen in transverse? vibrations such It happens and the wave moves like this. That 90 are in degrees. Look ahead What is the unit of momentum? Newton meter Newton Kilogram kilogram by metre newton metre by second Meter by second. So look at its answer. Impulse What is the formula of? Formula for momentum p = m v m is the velocity in kg, v is the velocity in metres per Second, tell me what is the answer to this kilogram meter per second There are only two types of waves: longitudinal Wave and transverse wave, all other parts of it Look further at the relative density of is called the mass of a substance and The ratio of volume to density of a substance and water density ratio Option C is any Ratio of weight and gravity of a substance D. The ratio of the pressure and temperature of a substance So what is the correct option? The option is any We can measure the density of a substance and the ratio of water to What do you say? relative density. I I said no, water is the most wonderful thing in this world.
It's a thing. Look ahead. When reading the focal length The power of the lens increases, decreases, remains the same remains, becomes zero. then the focal length The formula for is P = 1/ F. If F is increased If so, what will happen to P? Will reduce.
That means it decreases. What is? It decreases.
Next question. For spherical mirrors Relationship between focal length and radius of curvature What is? R = F/ 2, R = 2F, R = F and R = 3F in R and F in standard notation Is. is the standard symbol. They should know What does that F mean? And what does R mean?
Is it here? So the answer to this is son, this R = 2F. R = 2F.
Next It is a concave lens. Now tell me, now there is confusion Questions will come. a concave lens is Which of the following is a convergent or divergent optical plane?
bit is correct tell me now tell me It has the option A diverging concave lens is diverging. divergent What does it mean? Which spreads the rays.
Look ahead. Makes a concave mirror. concave What type of images does a mirror form?
Only virtual, only real and both Types of reflections and answers fourth D any No. So its answer is option C. concave Five of Mirrors The reflection is real and The sixth one is virtual. so If both real and virtual happen then answer will be Both types of reflections are gone. Look ahead Makes a convex lens. convex lens only Virtual Only Real Both Types reflection. what type of convex lens Creates a reflection? See convex lens. So both types of convex lenses Creates reflections of. concave as The mirror works. concave mirror A convex lens works in the same way. These Remember the thing. See ahead. of a concave mirror There is focus. Focusing mirror of a concave mirror behind, in front of the mirror, at the center, infinity But. Tell. So the first thing that should happen is What is that focus? focus of the principal axis parallel ray of light The point at which it strikes after reflection resembles or appears to resemble We call that focus. So that's what the focus is In a concave mirror, all your You know, right here in front of the mirror.
Option B: In front of the mirror.
Ok. see you next. focus of a convex lens There is distance. Now tell me the focus of the convex lens.
What is the distance?
The focal length of a convex lens is positive, Negative, zero and infinity. The mirror and lens The question is very confusing. Now I I will give their summary. You never doubt Will come. Tell me the answer to this. Now consider the convex lens What is focal length? You are telling wrong.
Answer Someone please tell me the truth.
Wrong. The answer is son A is positive. One Remember the trick. UP means UP Which lens is a convex lens?
The focal length is positive.
How will it be for others if they are negative?
It will go away just like a mirror in a mirror If the mirror is convex then its focal length If the mirror is a concave mirror then its Remember how negative the focal length is.
Next question is the main function of a convex lens.
A convex lens is used. His Main uses are in making glasses, cameras or In the magnifying glass, in the mirror, in the battery.
So the answer is B camera. magnifying glass The convex lens is used in camera It is used in making. next question Concave lens is used for farsightedness in correction, near vision correction, light In production, in sound. tell me which one Is the option correct?
Concave lens is used for near vision In vision correction. Remember how? it There is a word far and there is a word near.
We have a word called convex.
And there's a word called concave.
Only lens is used, son. is concave.
Isn't it concave? Ok? So two words away So go to the smaller word. nearby If there is more, then the one with more words has it.
Go. distant vision is achieved through a convex lens farsightedness and nearsightedness It is removed by a concave lens. So remember that Use of concave lens for myopia It is used. Next What is the value of the near point? So this is for everyone Do you know. Tell me the answer to this. A 10 cm B 20 cm C 25 cm and D 50 cm So the answer is C. that the minimum What should be the distance between our eyes? 25 centimetres so that objects are clearly visible.
You can keep more than that. But the minimum This much should be there. Next, hyperopia What is it resolved with? vision The defect is rectified by a convex lens From. Two words short word. Ok? Memory Will be done. So what is cataract?
It is something to remember and you should remember it. Eye Inflammation in the eye is called cataract. Of eye Corneal tear, Option C lens of the eye becoming blurred or opaque and options D. Deterioration of the retina. So the answer is Option C: When the lens of the eye is cloudy If it happens then we call it cataract.
What do you say? cataracts.
Ok? See the next question.
What is bone magnetism? This son is a It is a disease. Ok? English name is. Just like that Remember the name. Watering of the eyes. of the eye a defect in which the cornea or lacrimal gland is uneven goes. Option C: No color visible. Option D Smallness of the eye. tell me which is the answer Its? The answer to this is such a defect of the eye in which The cornea or lens becomes uneven. For him We speak of bone magnetism. To understand Are you coming Lado? See the next question.
How is the image always formed in a concave lens?
Is? You have asked for a concave lens, son, here it is concave.
Don't call it a mirror, the lens in it is concave How is the image formed? What is a concave lens?
This is a concave lens How is the image formed in it, virtual and I will also remind you directly that How are images formed by a lens?
Next look at the focal length of a plane mirror How many such questions are there in the exam?
They keep coming, simple-simple, tell me how many there are Positive, negative, zero, or infinity.
What is the focal length of a plane mirror?
The answer to this is infinite. How much is it? Infinite.
Next. more sunlight What color is the deflection? Now tell me Its answer. Which colour has the maximum deflection?
What happens?
Tell me the answer to this brother, D is wrong, option D is wrong.
See the answer, the answer is Vibgor Vib GYORV means purple violet violet which one is violet here it is It has the greatest deflection Whose red color is less?
colored Ok? Next question. one horse power How many watts are there in a? 500 watts, 746 Watt, 1000 Watt and 736 Watt. tell me about it Answer. The answer to this is its 746 watts. 746 watts This is my son.
Ok? Next question.
Suitable for treating presbyopia Which lens is it?
Suitable for treating presbyopia The lens is a bifocal lens because we have I read the convex lens, it was in the distance I had read concave, it was myopia So which one is left is this flat lens?
It is not the only one used in the eyes.
Is. Ok? Now look ahead.
atmospheric pressure inside the balloon How does it happen? less than or equal to zero So the answer to this is more balloons, son.
The pressure is greater than that of the atmosphere, so it It remains swollen.
Ok? Now the next question Which is not a method of heat transfer?
Option A Chalan, Option B Sanvan, Option C Radiation, Option D Reflection. So the answer to this is reflection. Reflection is the transfer of heat There is no method. Reflection is a phenomenon. conduction What happens? In conduction, the object is solid in which one molecule gives energy to another molecule And as it got hotter, the last one also It heats it up. What happens in intercourse?
In Sahavayan, Sahavayan means sum plus carry. carries the same. As soon as we go down We provide heater to the water. Ok? Or To a liquid, that liquid which is at the bottom He took the energy that was lying there and rose up. So much As much energy as this particle takes, it The one that was found will also rise up. co-convection co-convection This is what it is called. carry the same energy It is called convection. What is radiation called?
Radiation speaks son in English radiation in which the energy of a medium What is required is a completely fluid medium Needed Ok? and medium for light There is no need for either. of light which Because they are rays, they come from vacuum.
Too. Look ahead. unit of measurement of the ozone layer Pascal, Dobson, Hertz and Watt. So its The answer is Dobson. These have to be remembered.
On what principle does an electric bell work?
Is? on thermal effects, on magnetic effects, chemical effect and optical effect But. The answer to this is beta option B magnetic On impact. How does it work? Look here But there is a spring attached to it. It felt like this here There is a hammer and there is a Plate through which current flows. As soon as it If current flows, it will become a magnet. magnet If it is made, it will attract the hammer. Hammer If it falls on this, a sound will be heard. Then the stream It will stop. Ok? So this hammer The spring will pull it back. The stream will return Then it will call back. Thus, according to which we I set it to that and this is the sound that comes out Is. Sir teaches very well. Thank you.
Next look ahead. Celsius at what temperature And the value of Fahrenheit is equal to? Very This is an important question. Option A Zero degrees, Option B 40°, Option C – 40° and Option C 100 degrees. So the answer is -40°. Don't even remember this. This formula also It happens. Centigrade equals centigrade = 5 / 9 in bracket F - 32 This is the formula. What is this saying that Celsius and Fahrenheit should be equal. That is, C Instead of ' you write F and instead of F write C.
I'll write F here. So it happened 5 / 9 This F This 32 Look ahead. Nine to F How much will it be if you multiply it? 9f what here Left? 5 f minus how much? 32 Ok? So that's it 9f look forward to five Multiplying it by f gives 5f and five Multiply by 32. This is 32 * 5 divided by 32.
What will happen if you multiply it? 5 * 2 = 10 5 * 3 = 15 and how much will this be? 16. OK Is? This will become 5 f and this will come to 9 f.
Now look, I am explaining this a little here.
9f = 5f - 160 If this 5f comes here then how much will it be 9f - 5f equals how much -1 in 160 9 Subtract 5 from it. What will be left? 4f = -1 160 four Divide by f equals what remains -1 160 / 4 so f is equal to what minus 40° Now let me give you a question that It is 10° Celsius, convert it to Fahrenheit.
So use this formula. instead of C How much should you take? 10°. Do you understand? So You should have such questions.
Next question. electric fan works on the principle? Electricity on thermal effect, electromagnetic effect But the principle of induction and refraction Principle. So the answer is B. Electricity Magnetic effect. What happens now is that the fans There is a motor built around it. As electric current flows through it So it becomes a magnet. As soon as it becomes a magnet, its The rod that is placed inside acts like a magnet The reason revolves around. So here we have What did you put on? Installed the fan wings. They also roam around. So the electromagnetic effect They move around because of. Look ahead. in the sky What causes electricity to be produced? adorable There is a question.
due to gravity, due to friction Accumulation of charge, C refraction of light A due to, D due to air pressure. So its The answer is accumulation of charge due to friction Happen. Clouds collide with each other in the sky Are. They rub against each other when they collide. Among themselves In physics, we call rubbing as friction.
Due to that friction, the charge of one cloud is transferred to another.
goes into the cloud and what is the charge goes? It gets accumulated in it. whose Because when the charge is discharged then Lightning flashes. What happens then?
There are shocks. Ok? next question See.
What type of energy does a windmill produce?
Does it convert?
windmill converts electrical energy into mechanical energy converts it into energy.
mechanical energy into electrical energy converts it. to thermal energy converts it into light energy.
chemical energy into thermal energy It makes changes. This is a very sweet question.
So the windmill is a machine which is like a fan There are fans, meaning machines. what about the machine Makes it? electricity which converts mechanical energy converts it into electrical energy. Correct Is? Next question. thermal energy which is He light energy heat energy to light Name of a device that converts energy Tell me what does one do with heat? Light changes into. Ok? And his name is also Tell me which can convert electrical energy into mechanical energy converts into energy. Ok? Its comment Do it quickly.
Next. What type of mobile charger Does the stream? i.e. which mobile charger What type of stream does it create? A. Alternating current, b direct current, c zero current, d Variable current. So the answer is B. Direct current. Direct current makes things faster It gets charged. So the charger is How is it made? Direct current.
Therefore, the vehicles with lights are DC.
It charges quickly. Because DC What is current? It keeps going straight like this And what is such a current? Such a current never It goes like this, sometimes it comes here, sometimes like this Even if it comes, it takes more time.
Is. Ok? Look next. Which of the vehicles What type of mirror is used?
Very cute question. Tell me the answer to this.
Radhe-Radhe Sir. Radhe-Radhe son. In vehicles A convex mirror is used. What Of the mirror? of a convex mirror.
Where is this concave mirror used?
look at this one Vehicle headlights Vehicle writing Use of mirrors in vehicle headlights It is done, you answer it What is used in vehicle headlights?
goes?
do it. Look here.
Concave mirrors in vehicle headlights Is used for. While the vehicles There is glass, in that glass there is a convex mirror Is used for. next question Look, my questions are over.
Let's end this class here.
How was the session? Please do comment on this.
So talk to sir now.
Jai Hind dear. Those who don't have time, later I'll take a look at the class and leave a sweet comment.
Do it. Isn't it? And later whatever the brother saw Please do like. Sir 100 top questions Get it done which you might have also come to know. In this There are also questions that came in the exam and Like in other exams, how in further exams Questions will come, so are the questions. Both There are types of questions. So Lala, now you You can have fun. There is no problem with.
Jai Hind Vande Mataram. Bye-by love you too. Bye Bye-by Jai Hind.
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