Grand marathon revision physics RENEET in PW vidyapeeth tamilnadu

Added: 2026-06-01

[00:00:32]Can I Hello. Hello.

[00:02:15]Yes. Yes. Hello.

[00:02:18]Hello.

[00:02:21]Hello. Hello. Hello. Hello. Hello.

[00:02:24]Hello.

[00:02:26]Start.

[00:02:28]Hello.

[00:02:31]Hello.

[00:02:33]Hello.

[00:02:35]Mic check. Mic check.

[00:02:38]M.

[00:02:41]Okay. Okay. J everyone. I am Ahmed here your physics professor of the physics walla and we are here to discuss our need UG firstly let's discuss something that what is need so that our new aspirant also can understand that what is need and how we can understand and how how it will be help to them and to us also and to the new aspirants also and also to the droppers too fine so first of all the student who are preparing for the need or the new aspirants. I just want to know that is anyone know about that what is the definition because many of the student till now not know that what is the uh full form of the need and is the need is only for the doctorate or for the just u uh that that is the ambas so please answer me guys is it noa yes the need is not just only for the doctor or the ambers that it's actually stand for the vegetarians or the alli science or the nursing or so many things. So firstly guys please let me know what is the full form of the need that the full form of the need is need eligibility entrance test fine so guys and also remember the uh full form of the J that is the joint entress examinations these are the most of the common things that most of the student don't know till now fine so after that let's mug up some of the things which is very much necessary and uh very much important for the new aspirants. So I also take care of them too and after that we will move on to the question series. Fine students let's see here. So guys first of all the entity who handles the need. So firstly and previously it is handled by the CBSC.

[00:04:36]Fine CBSC itself did the examination of the need and after that it shifted to the NTA that is the national test agency.

[00:04:46]And this is our the caretaker of the need. And this is actually the villain of us who is just retest doing the retest retest retest. And we all are just in dilemma now. So don't worry about it. That dilemma will be uh break by you because you preparation very well and we all and we all are believe on you students. Fine. So see here what is the examination uh structure. So first of all in the examination structure we have covered that is the NTA uses or takes the physics and the chemistry and the geology and the botney. Fine. These are the four subjects. Actually these are the four subject but these two are the subp parts of the biology.

[00:05:43]Fine and after that that each subject that is physics chemistry geology bney consist 45 questions 45 questions in physics 45 questions in chemistry 45 questions in geology and the 45 questions in the botney. Fine students so 45 question each subject. So the total number of questions and if you see the pattern that the physics, chemistry, geology and the botney all are consist 45 45 questions like this 45 questions and you can even see here that the biology itself consists 90 questions. So you can see that biology is very very important for the need preparation itself. And we can also get these marks or get these questions very easily because most of the most of the times the biology is basically just depends on the CBSC things. And here we can see some difficulties but here this is completely just a mugged part of the NCRT of your class 11th and the 12th and even just being with me I will also let you know that what is the important topics of the biology and the chemistry and the physics too. Fine. So after that the number of the questions I already told you and in this that what what is the marking. So basically what the marking of the question is like that that for the correct answer for the correct answer you got the four marks and for the incorrect uh answer you got minus one. Yes there is a negative marking here too. And after that if you not attempt any question then there is nothing uh affect it doesn't give any effect to your marking fine. So what is the total marking? So we see here that the physics chemistry biology that is the here the two parts the zoologology and the botney each have the 45 questions. Here also the 45 questions and here also the 45 questions and here also the 45 questions. So if let's see you are a god child and you correct all of the physics questions then your marks will be like this and means in every question and when you calculate each of them then it becomes 720 marks.

[00:08:14]So your need exam is of 720 marks and here that uh the biology itself consists just only 360 marks and 180 consist by the physics and 180 consist by the chemistry. So you can see that most of the scroller or most of the ranker got most of the marks in the biology because they stronger its part and today here we will discuss about that most of the uh difficulty phase subject that is physics and soon we will discuss some uh pqs and some questions too and I will make you frank with the physics too fine and after that the what is the exam duration. So we already know the exam duration is 3 hours and 20 minutes.

[00:09:03]Okay. And if we see in the minutes then it is 200 minutes. Okay. And in 200 minutes uh in the 200 sorry uh yes in the 200 minutes you have to attempt 180 questions.

[00:09:21]180 questions in the 200 minutes. I know it is very difficult portion of the students life that to face the 180 questions just in 200 minutes. Um you can uh want some more times in the physics of the questions and the chemistry also and the biology also because biology is most of the thinking part but at the end I we have to do and we will do fine. So after that uh where you have to do the need registration. So the need registrations will start in the Feb of the month and you have to go here that is the need.nda.nic.in In here you have to go and do the neat registration fine and after that what is the exam month? So exam month is the May and you can also see that the last month we face a neat exam also and uh that will cancel because of some issues with the uh conducting of the paper and uh it will be going to retest and soon it will happen. So for this we are here so preparing you very well and so that you good achieve the good marks and the application fees if we see here the application fees.

[00:10:39]So the application fees is according to the three categories. If we see here the journal category. If we see here the OBC and the SC and the ST and the another one is the that is the uh PW category that is the physically disabled persons and for the general category we have a fees of 17,000 sorry 1,700 and for the OBC and the STSC we have a fees of 1,600 and for the PW category we have the fees of,000. we have means the uh NTA decided the fees for the need. Fine. And after that this is the number of the pattern.

[00:11:20]You can see the aspirants of the needs or the prep for the need. You can even see that in the 2023 there is just only uh 21 like students here and in the 2023 the max the number will increase the number will increase and number here decrease because uh there is just the period of after the cover and it will revive as soon as possible outcomes and here we can see that is a 25 flex but in the 25 again it decreased and in the 26 it little bit decrease in the thousand terms not in most of the terms uh there is just some 4,000 uh number of students gap between 2025 and this time that is 2026.

[00:12:07]So what is the exam centers and uh here the exam centers in India itself has till now 551 center that 551 centers in the India and internationally we have the 14 14 internationally we also occupied our uh that is need examination and internationally it is happen in the Middle East Southeast Asia and the Africa too fine so what is the eligibility ibility criteria. So firstly student you have to be a 12th appearing student or the 12th pass out student and the uh the student sorry and the student pass out student and the student must carry that is PCB what is physics chemistry and the biology the student must carry these three subjects and after that what is the percentage if I am saying that student must carry the PCB that is the physics, chemistry and the biology. So according to the category wise we have the three categories that is the journal journal category OBC SC and ST and the journal PW.

[00:13:21]So that is the P that is percent uh P. So we see here that for the PCB PCB for the general category we required the 50% means the NTA required the 50%age of the student in the CBSC fine and for the OBC it required the 40% and for the uh physically disabled person it required that is 45%age 45%age in the uh CBSC examination for the PCB only just for the PCB not for all subjects just only for the PCB fine and after that these are some important topics as I assured you that I will provide you the uh important topics of the biology. So please have a look that cell structures and the function. And you know what these chapters now are just not only start in the 11th standard or the 12th standard. You can even see some of the history of these chapters in your class 9th standard. Okay. And that biomolelecules chapter, the cell cycles and the cell division, the plant psychology and the human psychology, the plant kingdom. These this is the chapter plant kingdom and an animal kingdom. You can see this is the vast uh chapter in the class 9th also and you can even face this in the class 11 too. And there is a genetics and the evolution. Okay. And the molecular basics of the inheritance, biotechnology, human reproduction. You can see this chapter in class 10th also the reproductive health. This is also the subtopics of the class and even you can see these topics in your 11th 12th too but in your uh junior standards too.

[00:14:58]So I'm just want to say you that your need preparation is just not start from the 11th to 12th. Your need preparation start from the foundation from the beginning of the class 9 10th or from the ending of the class 8. Fine. So these are the chapters and the human health and the diseases and the ecology and the ecosystem. Fine. So these are some important topics or the important chapters of the biology. I know you you're going to face the exam of need.

[00:15:25]If you're going to face the exam of the need so you have to be being sure about that these chapters or the these topics are will be covered like very very clearly because you going to face the 360 marks and if I'm asking or uh telling on the basis of the number of the question then you're going to face the 90 questions of the biology. So please be insure about that this is your like a treasury Alibaba like a Alibaba thing if you get these things then Alibaba will definitely get you the or provide you the treasury. So if you want to rank in your re need test you have to be insure these topics very well and in the chemistry we have that is the mole concept. Right now the CBSC has uh removed the mole concept from the class 9 but it is the first chapter in the class 11th and I hope and I believe that you are being expert in this chapters that is the atomic structure thermody thermodynamics is itself of the class 11th is very exciting interesting and most of the uh little bit on the tougher side but our faculty made us very very very easy to the students and student feel like ah thermodynamics it's very easy and the equivalium and the electro chemistry and the chemical chyntics and the solutions these are the chapter of the physical chemistry so here you can see also I classify your chemistry because I know the student are face so difficulty in these two chap in these two subject like physics and the chemistry so that's why I do the one thing for you that I classify the chemistry in the manner of the physical chemistry organic chemistry inorganic chemistry and after that If you mocked up all of these things, if you understand all of these things and still you want to complete more of the things, then you can going to go with these topics that is the highest priority topics here. And so in the organic there is a journal organic chemistry and the hydrocarbons, hello these are some of the mine also the favorite topics also when I study the chemistry in the class 12th. So the alcohols and the phenom phenols and the uh ethers and the alihides ketone caroxilic acid amines biochemicals these are the topics of the organic chemistry and if we see here the inorganic chemistry. So here we have some chemical bonding period predictable coordination uh compounds P block D block F block elements these these chapters the P block D block F block this is very very interesting chapters of the inorganic chemistry and for the highest priority if you see here we have to be be insure about chemical bonding and which is the inorganic chemistry which is from the inorganic chemistry and the coordination compound which is also from the inorganic chemistry And the journal organic chemistry is also you have to be insured journal organic that some of the basics some of the most important terms and the uh some of the reactions reagents and you have to be be insure about that how going to you use this or you have to be insure about it.

[00:18:35]Fine. And after that there is a named reaction and the thermodynamics and the hydrocarbons it itself a complete organic. Fine. So after that let's see the important topics of the physics. So for the physics let's see here class 11 the first chapter itself that is a unit and dimensions. This is very very important guys very very important you have to be prepared well for the preparation or the uh if you are going to uh give the exam of the neat fine. So laws of motion yeah fine this is the history of the class 9 that laws of motion is also there and you can even see that the these chapters are also so can you see also that these chapters now are also belongs our class 9th 10th 11th 12th so you have to just mugged up or the revised very well or you have to be expert or you have you I don't want to I don't want to say that you have to be expert but you have to be a keen knowledge of the topics fine so from your 8th, 9th, even 10th and even 11th and 12th. So these are some classes which is very very important for your need preparation and these are the topics of the class 11th that rotational motion. This is itself a chapter like solutable and after that there is a gravitation and the thermodynamics and the oscillation and the waves and after that there is some electrostatistics chapter current electricity magnetism electromagnetic inductions ray optics modern physics and semiconductors. These are the chapters of the class 12. These are the chapter of the class 11th and for the highest priority. I know I know very well you student face the difficulty in the physics also that's why I put here a highest priority topic that is our current and electricity you have to be complete it very well and why I'm continuously saying that you have to be being sure about your 9th 10th and 11th 12th is also because student when uh you even see that uh the past need re the sorry the not the re that is the need 26. I even also show you some of the questions of the class 9th or the 10th level in your neat examination.

[00:20:50]That's why I'm saying you your base should be like a solid. If your base should be solid then the upcoming building will be going to too high or the going to be too successful. So if you going to make your life too successful so you should or you have to ensure about your foundation. Fine. And after that there is a current and electricity ray optics electrostatistic semiconductors thermodynamics and the modern physics. These are some of the topics or the some of the chapters you have to be insure before sitting in the examination of the rene. And one more thing student if you prepare well if you hard well if you smart well but still you don't get the result then don't worry about it. Don't worry about it.

[00:21:37]Some of the people get the things very uh fastly very uh priority on the very um or we can say at that very firstly but some of the people have to do some work so don't worry about it you going to uh get your goal but after some time but don't uh divert your focus or your inconsistency just maintain these things if you're maintaining these things then you're definitely going to achieve your dream and your goal and you also So going to make you happy your parents too. Fine. So after that let's do some pyqs of the physics. Fine.

[00:22:15]So I'm starting here the pqs of the physics. So let's see the first question here that the speed of light in a vacuum is taken as unity. Okay. Then what is unity sir? You can even also see this uh word that is unity in the maths in the physics also. So what is the unity?

[00:22:34]Unity is always means one. So what is the one here? Speed of flight in vacuum.

[00:22:38]Okay fine. So whenever you have the things just write it the given first because in the physics the given is like your the breathing. If you breathe well you health well. So if you uh write the given well then you get the answer well.

[00:22:51]Fine. So here what is the thing here that the speed of the light is taken as unity. So we have the speed which is here one. Fine. Okay. I'm going to write I'm don't going to write here the SA unit because we don't have given here the SA unit. Okay. So after that if the light takes 6 minute 40 seconds. Fine 6 minute 40 seconds. So write down here the time that is the 6 minute 40 secondond. So first of all I know it very well. So uh the ay unit are not given here. Okay fine. But you have to convert the time into the uh exactly in a same manner of the essay unit. So, so it becomes what? 6 into 60 + 40 and it is uh 360 + 40 that is equals to the 400 seconds. Fine. So, we have the time of 400 second and the speed is one unity or we can not as a one unity or we can say it as a unity. Okay. So, the light which is reaches uh the earth from the sun.

[00:23:53]Okay. Fine. There is a earth, there is a sun and the sun provide the light to the earth in the speed of the one unity for the time period of 400 seconds and the distance between the sun and the earth is in new units. So I have to tell here what is the distance? Fine. You see here guys see speed is of what? Light speed is already given. The time period is already given. I have to tell what distance now distance whom? Distance of light which he traveled sorry which it traveled from the sun to the earth.

[00:24:28]Okay. So what is the speed? We have know we have already know in the given portion and the time is also know. So just basically use the formula that is what speed is equals to distance upon time. Simple guys 1 equals to what is the distance? I have to find here what is the time period that is the 400 and what is the distance? That is the send it here and it become what? 400 m. Fine.

[00:24:51]That's it. Third option. See, is it difficult? Is it difficult? And if you still fail in this type of a question, then I definitely say you that you have to be focused about your foundation. You have to be because see now this is the simple question ever.

[00:25:09]What is this? This is just a simple speed is equals to distance upon time.

[00:25:13]Now the student face one difficulty here. The face difficulty here that is the unity word. They they were like ah what is this unity ah I don't know sir I don't know sir ar you know it very well you face it very well you face very very time and that is the unit unity means what one simple simple and just use the simple thing that is the speed is equals to distance upon time or you can even use here the speed is as a c or you can write it here the one more formula here that is the distance is equals to ct in this type of question if ever the question give you the speed of the light that is in the unity fine and please please be insure about your foundation.

[00:25:53]It is very very important. Now see look at one this is also the question of the motion. This is also the question of the motion and also I told you in the previous slide that your laws of motion is very very important very important guys. Fine. So the question what is saying that the following plots of showing variation of the velocity v with the time t of a wall throw vertically upward. Okay fine it is throw vertically upward and it fall back then which of the plot is r fine. So first understand that how the things happen when we throw anything upward and it comes vertically downward. So let's see u let's see this is uh the pen I have. If I throw it above so please let me know. I have to uh give some velocity to that pen or it go automatically like this like uh if I am the Harry Potter if I am the magician I just so it not go up. Why it not goes up? It not goes up because it required some velocity. So for this I have to give some velocity and if I give some velocity it reaches it reaches it reaches like this. This is the pen and if I give the velocity it goes upward and slowly slowly slowly it stopped at some height and when it stop what about the uh final velocity. So see here in the initial velocity I have some velocity I give some velocity and after that it decrease its velocity. So it is the case of the retardation when the object is goes vertically upward and when it reaches to the maximum height its velocity becomes zero and when it reaches to the maximum height then it comes back automatically. Why I said automatically because I'm not going to go uh go with the object at the maximum height and then comes with the object at the downward side. No, I just throw the object vertically upward and it reaches on the maximum height and after that it stops. It stops and then falls back and when it falls and it comings backward it coming downward its initial velocity when it comings downward it initial velocity becomes zero because it is at the rest position and when it comes downward it is continuously increasing its velocity. Sir but uh see the pen wheel goes up but it gets stopped in your hand. Array. If I uh remove my hand it fall on the stage. If I remove the stage it fall on the building uh building floor. If I remove that floor then it fall to the another floor then I remove every floor then it floor on the ground that is the road. And if I remove the road or digged out then it goes into that pit. Fine. So it always increase its acceleration. it sorry it increase its velocity when it coming downward. So what the case here the case is if I throw the object vertically upward and object will after that come the vertically downward. So in this condition always remember I'm giving you here some of the tips about from the foundation so that you don't need to waste your time to go and read again these things. So it is very comfortable for you just focus with me fine. So here we don't uh we sorry we have to give the initial velocity. So here it is not never the possibility that object will go upward with the zero velocity. No it is not going to happen. I have to be give some initial velocity here. That's why it always not equals to 0 m/s. And when it reaches to the h max, what is the maximum height? Its final velocity becomes 0 m/s. And the object you can see here also that the final initial velocity we have some not zero non zero and in at the maximum height we have the zero. It means it continuously decreasing its velocity. If it continuously decreasing its velocity then it is the case of the retardation.

[00:29:48]And if it the retardation and here the acceleration due to gravity will be in negative terms when the object will goes upward. You can see here also. And if the object is coming downward from the maximum height or we are falling any object from the maximum height we don't give that object the initial velocity.

[00:30:07]So what is the initial velocity here? So initial velocity will be 0 m/s. But it may be changed according to the question. It can't be fixed or the permanent things. Please read the questions very carefully. U clean your specs while reading the question or uh put your head into the wall if you not try to get the question very well or put your head into the decks. Fine. But read the question very well. Fine. This is our the main priority here. So here we have that is the initial velocity is 0 m/s and when the object is coming downward its velocity is continuously increasing. So whenever it tried to touch the ground at just before sometime if I'm going to say here the correct word is the intestaneous velocity at that point is vax is the maximum velocity ever and here the velocity is continuously increasing increasing increasing. So this is the case of the acceleration due to gravity that is the positive case here the acceleration is continuously increasing here the decreasing that is the retardation case here the acceleration case. So fine sir, we understand that is the retradation case that is the acceleration case. Now I have to find it in the terms of the graph. Fine sir. Okay. So first case is uh just read the question again that the variation of the velocity time graph.

[00:31:23]Fine sir. And one more thing the velocity time graph that is your velocity time graph. Here it is your velocity time graph that is your V that is your T. And the velocity time graph is always gives what? The slope of the velocity time graph is gives that is our the slope and that slope is always gives what acceleration fine even I can also make you understand some of the variations too. So see here if this is the velocity time graph and uh this is the velocity time graph and if it start from here and the line will be the straight that is the slope will be the straight then the object start from the rest and its acceleration is uniform it means its acceleration is constant it's acceleration is continuously that you can even also said that acceleration is not constant the acceleration is uniform here it means the acceleration will continuously increasing in a equal terms fine Okay. And if the things will be like this uh like this then it means that it is the uniform not it is the uniform and it is the non-uniform. Whenever you have the straight slope it means uniform acceleration. Whenever you have a curve slope it means non-uniform acceleration.

[00:32:32]Again in the uh that is the our um uh velocity time graph. Fine. And if the variation is like this, if the variation is like this in the velocity time graph, always remember that velocity is keep on constant and keep on same as the time period is increasing. It means there is no change in the velocity. This is the case where the acceleration is 0 m/s squared. Fine.

[00:32:58]And the slope will give the value of the acceleration.

[00:33:02]I hope you are understanding my point very well. Now discuss over this question. I hope you get enough knowledge for this. Fine. So what is the question here? That a ball thrown vertically upward. Fine. The ball is firstly thrown vertically upward. This is the case we have and then falling back. Okay. It goes up and it comes back. Fine. Like this. It goes up and then it comes back. Not like this. It goes up and comes back. Fine. So in the first case, in the first case what we have, we have the slope is like this. So guys this is the slope in the first part we have a slope like this and the slope is like this see just read the graph if you don't get the graph just put some values let here be five again here be the five and here be the 10 okay fine so on the 0 seconds we have the 5 m/s and when the time is the 5 seconds we have the velocity is zero okay sir velocity is decreasing sir velocity decreasing it means it is the case of the retarding Sir this case can be happen. Okay. Okay.

[00:34:08]Fine. Fine. And here at the 5 seconds we have a initial velocity is zero and after when the time is going on the case will be like this. But this is the graph or not. Let's see. Put it here the question mark. We have some doubt in it.

[00:34:23]Now move on to the next graph. The first case is of increasing. So firstly the increasing is not going to happen here.

[00:34:30]It is the retardation case. It is not the acceleration case. The slope should be not like this. And uh the second thing is the retardation. So this is not our answer. Cut it down. This is the case again. It is the de accelation. Yes sir. And uh this one that is the again see we have some velocity initial velocity at the zero time period. And after some time we have the velocity uh that is uh let's suppose in the 5 seconds we have a zero velocity. Fine sir. But after the 10 seconds we have a negative velocity. Okay sir. this will we happen or not? Let's see the question mark also. Firstly the C here then after we will go to the D portion. Fine. So if we see here this case this case in this case this is not exactly happen. Why?

[00:35:19]Because this is not not happen. Why I will tell you first? Because the acceleration is both sides same. It means it has a same value. It means it has a uniform acceleration. If it has a uniform acceleration this is the graph of the non-uniform. So it does not happen. So B option and the D E option are cut. We have some doubt in the A, in the C and in the D because these are some cases which show the retardation and the acceleration. Firstly guys this is not to be happen. Why? Because these are the two separates graph. This is not the same graph. They show the continuity they sorry they broke the continuity and here we have the continuity. Continuity is like the object will firstly go upward and it comes downward. So that's why it is not the case. So if I said clearly, if I said clearly guys, so this option is not our answer. This option is not our answer. And we have some doubt in this. And again see this also breaks the continuity and we have some continuity. Continuity is what the firstly the object goes upward and it comes downward. It is the journey to come go upward and downward. There is not a like firstly it goes upward and then it sit and it's like eating something goes and na shop do everything and nah it is like it goes upward and it comes downward so there is no break in the continuity so again it is not the answer this is not the answer now we have the two answers okay fine guys one thing is also velocity is the vector quantity if it is a vector quantity it depends on the direction it has the direction fine if you see here here the object will goes upward and here the object will goes downward. We have the two different directions. Yes, we have the two different direction. What if I take it here as a positive and I take it here as a negative. Let's see here. So this graph will show that acceleration is continuously decreasing. So this is also not the answer because you can see now here this is the velocity time graph and it continuously in the downward slope and the downward slope in the velocity time graph is also not the option. So this is also not the option.

[00:37:25]So then then this is only the option and the graph and the graph is like this.

[00:37:30]That is the graph. See here guys. See this is the graph. See this is the complete graph we have for our question and that is the correct answer. Why it is firstly it is the continuous graph.

[00:37:44]Fine. And in this case at some time that at the point of the 0 seconds we have some velocity let's suppose minus 5.

[00:37:52]Okay. When the time is 5 seconds, we have the velocity is zero. Fine sir.

[00:37:57]Okay. The object will goes upward.

[00:37:58]That's why let's suppose its velocity is minus 5 m/s. And at the time of the uh at some time let's suppose in the 5 seconds we have the final velocity zero.

[00:38:07]So this is the case of when the object will go vertically upward. And when the object is on 5 seconds let uh this is on the highest uh that is the highest height it comes downward. And when it comes downward its velocity is continuously increasing. And you can even see after the 5 seconds it reaches on some 10 seconds and it has some positive side velocity that is let's suppose that is the 10.

[00:38:32]Let's suppose the 10. So you can even see here that as the time is increasing as the time is increasing the velocity is also increases. Fine. Uh I make it a graph here very clearly and understand it like this. Fine. This is our the 5 seconds. Let's suppose this is our the minus 10 and here we have the 10 and here we have the 10 seconds. Now understand at the time of the 0 seconds we have the velocity that is - 10 m/s.

[00:39:05]Let's suppose here we have the velocity that is the - 10 m/s and at the time of the 5 seconds we have the zero velocity.

[00:39:12]Yes, it's happened. At the time of the 0 seconds we have the minus 10 m/ second.

[00:39:16]Why is here the minus? because I took the upward side as a negative and downward side as a positive because we have the two different direction and velocity is the vector quantity. Fine.

[00:39:25]So it goes upward and it reaches to the maximum point and the velocity becomes zero. So it is the complete case of retardation and after that it comes downward. It comes downward and it when uh sorry and when it comes downward the time is continuously increasing. See 5 to 10. Okay fine sir. The uh the object will coming downward and when it coming downward it velocity is in positive direction and see after 5 to 10 seconds it velocity goes from zero to the again 10 m/ second and in the positive side.

[00:39:58]So this is our the exact graph. So we have the graph that is again I'm saying the right answer of this question is D.

[00:40:08]And guys if you ever read your class 9th very well that is the motion chapter then after see this question now you feel like very very very happy definitely very happy because this is the question which is already discussed so many times in class 9. Okay fine guys. So this is the case and uh this is the case of the upward and this is the case of the downward when the object will goes upward and then object comes downward.

[00:40:36]This is the slope and the answer is D.

[00:40:38]So the answer is third. Third only that is the D only. Let's move on to the next question. So the next question is like the sum of the okay it comes from the work power and energy. The two starting questions are from the uh the chapter that is the motion and this question is comes from the work power energy. Let's discuss the question. The sum of the kindinetic energy and the potential energy of a simple pendulum. Fine. What is saying? Firstly write the given as I told you. If you breathe well, you health well. If you write given well, you correct well. What correct? Well, not the well that where you dig out the water. That is the well for to get the good marks. Okay. Fine. So, the sum of the kinetic energy and the potential energy of a simple pendulum is 0.02 jou.

[00:41:24]Okay. Fine. So, we have a energy that is the total energy. Total energy is always the sum of the kinetic energy and the potential energy. And we have the total energy is 0.02. 02 jou fine we have the total energy that is the 0.02 02 joule and the speed of the simple pendulum at equilibrium position is approximately is equivalent position.

[00:41:48]Equivalent position is the position where the uh things are uh things are um initiating. Oh sorry the things are approaching to the rest condition or it may be at the rest position. Fine. So you can even also understand this. I know the student is always faced this question as a very difficult because in the pendulum they got confused things with this. So just uh take this things as uh compare it the previous one question like this if you throw the object upward and the downward and in the uh work power energy chapter there is a thing that is the law of conservation of the energy where you can even study that if you take a object at some height and then throw it and when you are throwing that object fine so in this condition it has the total potential energy and during the middle of the journey it has term kinetic energy plus potential energy that is the total energy and here the total energy is only potential and the kindinetic energy is equals to the zero in this condition and when the object is try to touch or try to be reach on the wrist position or the equivalent position at this point it has some maximum vax as I told you already told you is this position it has some EK that is only the EK not the potential only the EK EK is means what that complete energy is in kinetic form. Fine. So this is the concept. It is not from your 11th 12th.

[00:43:15]If I honestly said now it is the concept of the class 9th completely question of the class 9 from the topic of the law of conservation of energy. You see here guys when you throw any object firstly you put it in a hold at some height. So at that time there is the there is no motion in this object. So the velocity will be zero. If the velocity is zero then the kinetic energy will be zero. So your complete energy will be converted into potential energy. So the complete energy is in the form of the potential energy and when you just fall it the potential energy start like this. Uh firstly there is a complete here is the kindinetic energy and here is the potential energy. At some height the potential energy is the maximum and the kindinetic energy will be the zero. And when you start throwing the object uh with the time the energy will converted into the start converting into the or transferring into the uh the right word is to the transfer the transferring into the kinetic energy like this like this mana. Fine. uh during the journey or during the coming towards downward position the at some time the kindinetic energy and the potential energy both are same and when it try to reach the ground the kindinetic energy continuously increasing and the potential energy coming down means uh tends to the zero and the kindinetic energy will be the maximum at the point where the object try to touch or reach the equivalent position. So this is the case we g given in this 36th number of the question of your need paper of 2026. And here you can see here that at the point where it touched the ground where it tried to touch the ground or the rest position try to reach on the rest position we have the maximum velocity. It means the complete energy will be transferred into the kinetic energy. Okay sir got it.

[00:45:02]That complete energy is actually nothing but just a kinetic energy. Read the question again. The sum of the kinetic energy and the potential energy of the simple pendulum is 0.02.

[00:45:14]The speed of the simple pendulum at equivalent position. I again told you what is the equivalent position when the object is try to reach at the rest position. Fine. So this is the condition. This is the condition. Okay.

[00:45:27]Fine. So uh try to reach at the equivalent position is approximately. So I have to find here the speed. So guys see we have the total energy. So that is equal to the kinetic energy. And we have the formula of the kindinetic energy that is the half m v². And what is the formula of the uh kinetic energy?

[00:45:48]Yeah. Uh what is the half mv square and what is the total energy? That is the 0.02. And what is the mass? We have mass uh we have in this question that is the this 20 g. Now now most of the student get confused guys please remember the standard unit for the mass is the kg not the gram. Fine please remember this. So the mass we have is 20 and so the mass we have is 20 g and for this you have to convert it into the kg divided by the,000. Okay fine. So it is divided by the,000 and after that I have to find it here. That is the velocity. Fine guys now point it down. Remove the decimals.

[00:46:34]We have the 100 in the denominator. Now you are not the child. So I'm supposing that you know the calculation very well.

[00:46:42]So 0 and 0 cut. So 100 and 100 cut. So the answer is just only two. So the two is equals to the v². And when we set the v square we get that is the roo<unk>2.

[00:46:53]Fine. The roo<unk>2 is in plus minus.

[00:46:55]Yes sir. So I already told you whenever the object coming downward it has a positive velocity. So we have to just take only the positive <unk>2 and it is the positive roo<unk>2 and <unk>2 is always what? 1.414 m/s. Now see what is the answer? What is the answer? Four uh 41. Okay. It is not the answer. It is not the answer. Ah finally get the answer. See four marks all yours. And I'm taking here time just because I have to explain the concept also. If you already know the concept now you directly just use this use this and after do the calculation and you don't need to even do this plus and minus things you just reach on this and even you get you reach from here now you can get that your answer is 1.414 414 m/s. That's it. Simple simple theory of your fine. The room heater is rated with the 400. Okay. So guys, basically it is the question from the electricity chapter.

[00:48:00]Fine. So the room heater is uh rated 400 watt. Okay. We have the given things here. The given thing is that the power is 400 volt. Fine sir, we have the given that is the power 400 volt and okay the room heater power is 400 volt and it works on the potential or it required the potential electric potential uh that is voltage that is 220 220 volt fine okay if the supply voltage drop to okay so the question is if the uh supply drop uh supply voltage drop to the 200 volt Sorry 200 volt then what will be the power consumed by X approximately okay fine guys student please understand here one thing read the question again read the question again why I'm saying here because a room heater okay we have the room heater fine we have the initial thing that is the room heater fine we have the initial thing that is the room heater we have a room heater fine it works it required a power it required a voltage It works on a power. It has some power. It work on a voltage. And if the supply voltage drop to this fine. The voltage we change in the voltage which is coming from the main source. We don't even touch our room heater. Room heater is still in the room. We don't touch it.

[00:49:28]Fine. The voltage get wrong. But the room heater is there. Fine. We need room heater. We need hot air. Okay. What will be the power consumed? Okay. Then at that time what is the power consumed by the heater? Guys remember we have the two cases. What is the two cases? We have the potential and we have the again one more potential which I take it as a Vdash. And here we have the voltage is 200 W. Here I have to find out the power. Fine. And in these two cases one thing is very common. What is the common room? What is the common room? Wow. Fine sir. If you get this thing now, you get the question very well. If you don't change the room heater, can you please tell me what things remains the same in it? Tell me. Huh? Huh? Yeah, you are going right. That is the resistance.

[00:50:21]Resistance is same. The resistance which is here that is because this resistance is not of the supply because we don't have to uh uh know about the supply things and all because we need to focus about on what room heater we have to need to find the power if we are finding here the power of the room heater we need to know the resistance of the power fine okay so I can get uh from this information I can get the resistance even I can also get the current which is coming from the main source Okay. So we don't need this. So we don't do this. So we need just that resistance part and we use this sir. One more thing. Why you not find here the current? As you said you can find here. So why not we use here the current also current value? Why not we are using? Because the current will depend on the main voltage.

[00:51:13]And if the main voltage get changed because you change the voltage. Now 220 volt to the 200 watt. If you change the voltage, if you change your source, then how the current will be the same current is also changed. So this is not the constant thing. What is the constant thing? Room heater. And what is the constant in the room heater? Its power.

[00:51:32]No, it also depend on the main source.

[00:51:33]Then what is the constant? The resistance which is available or the used in it or the implanted in it during the manufacturer that is the resistance of the room heater. So I have to find here firstly the resistance of the room heater and then I have to use this here.

[00:51:49]Fine. So by these three things that is the PVR we going to use here the formula that is P= to V² upon R. And now guys I'm again saying to you that this is the basic formula of the class 10th. Now okay fine let's break this. Okay first complete this question and I will let you know here the other formulas of the power and how you can even remember it even also the formula of the energy.

[00:52:14]Fine. So see here guys we have the power that is the 400 fine and we have the voltage that is the 220 square and we have to find here the resistance. So the resistance is equals to 220 into 220 and divided by the 400 0 cut 0 0 cut and after cutting on the table of the two it is 11 it is the two on the table on the 11. So the answer is become 212 ohm. This is the resistance of the heater. So resistance heater is what? Resistance heater is 212 ohm. What it is? 212 ohm. Fine sir. Very well sir.

[00:52:53]Get it? Okay. Now this resistance is also at the same because it is again it is the resistance of the heater. We don't change anything in the heater. So we just need to find here what Pdash that is the new power used by the room heater when we change in the main voltage. Fine that is the V dash² upon R. What is the Pdash? We don't know what is the B dash that is the 200 into 200 and what is the R 1 to 1. So the answer is four uh 4 in 4 0 0 0 2's are 4 and two zeros and here the 1 to 1 let's correct the answer guys one more thing this is not going to answer fine and again this is not on uh so guys please see 1 2 1 2 1 and I am also going to teach you some tricks also so please be insured with the tricks too so if I multiply here the two so the answer is 2 42 again the 2 42 on the table of two in 1 to 1 if I multiply with the three the answer is 3 3 2 6 3 again it is a 3 63 again we have to use that three things three 3 63 3 63 is lesser than the 400 so the answer will be in three not the two so this is also correct uh wrong and again this one this is the 400 now if you multiply the 1 2 1 with the four you get 4 1's are 4 4 2's are 8 42 484 484 is not also the option because it if it we take uh the use the table that is the four then it become more than the 400.

[00:54:25]So it is not going to be good. Now basic math you know it very well. I know you are the need student but you know basic math too. Now 1 + 1 2 + 2 3 + 3 I know you very well. Okay. You are very genuine persons. So see here. So what is this? So we have to use here the four.

[00:54:42]Not we don't have to use here the four because the if we use the four on the table of the 212 into the four it become 484 which is more than the 400. So this is again not the option. This is not the option. This is not the option. This is only the option. Wait, wait a minute. By this you can even save the time. What time sir? A time to use the other question. To use it on the other question and you don't have to do that much calculation. Simple thing. You just need to find the first thing. You can even see now the first digit is continuously changing. Whenever you see this kind of the options, you not need to do the complete calculation. Most of the student just start doing the complete calculation and they was uh don't do this brother see see first that the if the options are in a variate digits now just do only the single calculation okay single first one I did it that on the table of the three it cut completely so the answer will be in my three three format is not here not here not here here cuta and okay now guys I'm going to teach you here what other formulas of the power. If you ever forget then how you can even drive it out. So basically we have the power is equals to work done upon time. I hope you know it very well and you remember it very well too. Fine. So what is this here that uh in the electricity chapter you know it very well. There is a formula of the voltage that is V= to W by Q and I= to Q upon T and V= to IR that is our ohm law. Fine.

[00:56:15]By these formulas we can find the other formulas of the power. So firstly on the ste on the uh place of the w that that is the work done I can uh write it here v into q fine and divided by the time I just send here the q which is multiply with the v. So it become v into q that equals to the w and divided by the t.

[00:56:36]And you also see here that q upon t is what current. So it is VI. Power is equals to VI. Fine sir. Very well sir.

[00:56:47]Good sir. Interesting sir. Now after that uh this is our the first formula.

[00:56:53]Fine. And this is the basic formula.

[00:56:55]This is our the first formula. Let's mark it with some another color. Uh yellow. Uh yellow. Yellow is the best color. Now yellow. Yellow.

[00:57:04]When you not study well, you always see yellow. Yellow. Fine. Okay. So this is about the first formula and from this formula I again find the another formula. What is the another formula?

[00:57:15]You can see here the V is equals to IR.

[00:57:17]So just put here I so when you multiply with this it become I² R. This is the another formula. Then use the yellow yellow. Fine. So this is our the second formula and after that and after that you can even use it here one more thing that on the place of the I can write it here V by R. So it will become V by R² into the R. So it become what? V² upon R² into R. Cut it with this and you get what? V² upon R. Use again yellow.

[00:57:57]Fine. These are the three formulas of our power that is P= to VI, P= to I² R, P= to V square upon R and we have the basic formula that is P is equals to work done upon time. You can even variate these formulas according to the given situations. We have only the given situations. We have the constant thing that is the uh object that is the room heater. That's why we use this formula.

[00:58:18]If the situation is according to that formula, we will use this. So if you ever forget this just remember this and this and drive it out and you will get you do not need to lose these kind of questions or one more thing these are the simple thing now revise it well when you sleep gives just 5 minutes instead of giving 5 minutes to your babu sona don't do don't give these five minutes to your babu sona instead of this use this this is your uh real actual babu sona. They will provide you the financial uh support. They will provide you the emotional support from your parents and the standards in your society. So the babu is just babu but these are things very important. Don't do these things and uh you are I know you are very good students. Okay fine.

[00:59:10]After that uh so these are the some questions. Okay. And I also told you that I will teach you the uh that is the energy formulas now in the uh electricity chapter. So see here we have formula like P= to W into Bden upon time and the next formula is VI and after that we have the formula is I² R and after that we have the formula is V² by R. So whenever you have the power and you want to go on the energy you do just what W is equals to power into time. See guys that W is nothing just the energy energy in the form of the heat. So we have the heat formula here. What is the first formula? VI. So the formula become vi. Okay sir. What is the another formula sir? We have I². So just put it I just putting here the formulas of the power one by one. B is equ= to vi. So it become vit= to i² r into t. Fine sir. And another formula h= to v² by r into t. See here guys. See if you just understand the one thing now you can already understand the other things. If the question ever ask you on the heating not on the ask of the power then you can even use this things and you get the answer and you get your four marks. Fine. Thank you guys.

[01:00:26]Now next move on to the next question that is a resistor. Fine. Again it is the electricity electricity concept of the physics. So a resistor is connected to the battery of 12 volt. Okay. The battery emf electromotive force of the battery is 12 volt and the internal resistance okay the battery is also have some internal resistance and the electromotive force 2 and after that it is the 2 ohm and if the current in the circuit is 0.6 six.

[01:00:58]Okay. Then the terminal voltage of the battery. Okay. Fine. We need to find here the terminal wtage. Fine guys.

[01:01:06]Okay. So guys, always remember we have always the formula that is the terminal voltage that we can also take it as a V and the V is equals to what? We have the EM uh emf that is electromatic force minus with the IR. What is the IR? That is the internal voltage. If I'm going to say here that is a kind of the internal voltage internal voltage fine it is the electromotive force that is also said it as the uh already I let you know here and it is the voltage at the terminals.

[01:01:40]So it is the terminal voltage. What it is? Terminal voltage. Fine. Fine guys.

[01:01:47]So just use this formula. What is the terminal voltage? And how you know it sir? Well uh see now guys what is the internal voltage or what is the internal resistance work is internal resistance itself to resist the current. So itself the battery is not providing that much of current which is uh which it made for it because it has some already some internal resistance. So that's why we have to subtract that things which is already resisted inside the battery and after that we have actual emf force but we have to reduce that internal resistance. So that's why this formula is like this. Okay you can even also think like this. Now after that for this what is the electromotive force that is the 12 volt. What is the current?

[01:02:31]Current is 0.06.

[01:02:35]Okay fine. And what is the resistance here? R that is this. Oh sorry uh 2 fine guys and after that the answer will be 12 minus 1.2 and the answer will be 10.8 8 volt. Simple is the answer is here.

[01:02:52]The 10 is not the answer. 12 is not done. Uh-huh. Simple, simple, simple.

[01:02:57]Fine. Easy. So the C see how much time it took? Nothing. Now don't worry about it. Y need paper is very easy. Just you have to be focused or the consistent or two have to be clear about your fundamentals. Fine. Don't worry about it. You can rank buddy. You can rank.

[01:03:18]See this is the complete conceptual question. Nothing else. completely conceptual questions. You can even see what is the E. E represent towards what?

[01:03:26]Energy. Now here you can see here the energy. Yeah. Here see if you don't even know you can even match this E E for E stand for the energy. Energy here energy of what?

[01:03:37]Photon HV. Yeah. Simple simple. Yeah. Depraction and interference is always tells about what?

[01:03:45]Nature. Nature. Nature of light. What is that? Huh? This is the option here.

[01:03:50]lambda is equals to h by p. Oh, it is the divor wavelength. You can even study this in the uh chemistry too. So this is the answer. Now the compat this that's it. So in the A we have the option fourth. Fine. In the B we have the option third. Fine. And in the C we have the option first. And in the D we have the option second. Fine sir. Got it sir. Got it. Now now find it. Find it the answer. A is fourth. A is fourth.

[01:04:20]Fourth. Fourth. Okay. Second question.

[01:04:22]Gul option wrong. Now after that B. B has a third. Third one. Third. Okay.

[01:04:28]First. This is also gone. C. C has the first. C has the first. Okay. Fine. This gone. This is the answer. Answer. Ah.

[01:04:35]This is the complete conceptual question. Completely conceptual. You can even read these things two to three times. Now this is actually the just definition of that particular chapter.

[01:04:45]Defraction interference. What is this wave nature? Ah split single split double split simple what tells about nature of the vape simple yeah don't we feel like it's not like a paper is paper don't worry so the power of a crane again guys it is from the work power energy fine so the power of the crane which lifts a mass see I told you now the mass is always in kg and this time it is accurate to a height of this fine so what the happen is here the power of a crane. Okay, comma which lifts a mass.

[01:05:22]Okay, the power of a crane means there is a some crane and the crane will lift something of a mass that is 100 kg. So please write it here that the mass is 100 sorry 1,000 kg but it is 1,000 kg and the height is and it lifted at the height of 20 m. Fine. And what is the acceleration due to gravity? That is the 9.8 8 m/s squared. Fine sir. Okay. Okay.

[01:05:50]We have gone to the time also that is the 10 seconds. We have the time that is the 10 seconds sir. Fine. Okay. Now we have to find here what power. I have to find it here the power. Okay sir. Fine guys. See here it is really completely completely foundation question. See if the crane lift the object at this height. Fine.

[01:06:15]This is the ground and it hides from that is 20 m. Let's go. This is the 20 m. Okay. And it lift it in the time period of 10 seconds. Fine sir. And at this here point the mass is 1,000 kg and the mass is always constant. It never going to the change. Okay. So the height is this. Fine. At this point of time object is at height. So at this point of time what we have the energy is it potential is it kinetic or or but I told you now according to the law of conservation of energy we have here only the potential energy that is the EP fine and this energy is also be introduced as a work done as a work done so I take it here as a W fine now guys see here we have a basic Basic formula that is the power is equals to work done upon time.

[01:07:13]That's it sir. And after that W is equals to what? W is C force into displacement upon time. Okay. And after that what is the force we have? That is the M. And the acceleration we have that is the G that is mg. And S S is the displaced at some height that is the H.

[01:07:33]And the time period is T. So see here guys we have the formula. Power is equals to mg divided by the T. Simple P is equals to what is the M here? The M is 1,000.

[01:07:45]What is the G? G is 9.8. Fine sir. And what is the height? The height is 20.

[01:07:52]And divided by what? Divided by the time period. And the time period we have 10 seconds. Now remove the decimal. It comes here with the 10. 2020 is cut. And after that we have the answer 98 into 2 multiply with 0. So the answer is 1 960 and if I convert it into the decimal format then my answer will be 19.6 okay guys one more thing here one more zero is also so yes so the answer is 19.6 6 kilo watt. So answer we have is this not this. Some of the student will go oh I got the answer and take the 19.6 watt. I don't do this. Here we have the kilowatt. And sir how we hear the kilowatt? Just divide this 19600 divided by the,000 and it convert into 19.6 kilo what? This is the answer we have. Not this not this. This is only the answer that is 19.6 6 kilo what? So see here guys again basic fine now see here light chapter ray optics what chapter ray optics optics ray fine these are the chapter ah interesting question ever what is the thing is here uh in a concave lens in a concave lens a ray of a light emitting from a object which is parall to the principal axis of the lens and after Repression. Firstly, the question is saying for the concave lens. Concave lens is like this.

[01:09:35]Fine. This is about the concave lens.

[01:09:40]This is our concave length. This is our optical center. This is our f_sub_1.

[01:09:44]This is our 2 f_sub_1. This is our f_sub_2. This is our f_sub_2 f_sub_2.

[01:09:50]And this is our here infinity. And here is also infinity. And always remember the left side is always a object positions. Okay, the left side is always the object position is uh that's why the U is always negative. And what the question is saying that he emits a light. Okay, the object it means uh the ray of light which emits from the object which is parall to the principal axis.

[01:10:13]Fine. The light which is coming from the object, let's suppose this is the object and the light which is coming is parall.

[01:10:21]What it is is this is the object that is our a b and after that what the happen is it coming parall to the principal axis guys if it's coming parall to the principal axis then what is happen what has happened sir simply sir it get diverge yeah because it is a diverging lens simple okay and if we ever extra pull out then it extra pull out on the f1 okay on the f1 now read the questions emerge and parall to the principal axis. Okay.

[01:10:55]Appears to be diverge. Appears to be diverge from the first principal axis.

[01:11:01]Appear to be diverge. Okay. Passes through the f_sub_2 and which is radius of curvature. This is not ever going to be the happen. Passes through the second book. No, not happen. Okay. Appears to be diverge. Okay. This is the option. I have to be feel like this is the maybe the answer. But read it again. appears to diverge from the first principal focus. And this first one is merges parallel to the principal axis. emerges parall to the principal axis. Again read the question now. In a concave lens, a ray of light emanating from the object's parallel from the object's parallel to the principal axis of the lens and after the refraction after the refraction then after the refraction what has happened?

[01:11:48]It is parall to the principal axis.

[01:11:51]Fine. So this is the answer. This this one is the answer that is appears to diverge from the first principal focus. You can see even here also. Okay. Now let's move on.

[01:12:05]Uh this is the best question. You can even see this. This is even the unit and dimension thing. Fine. So what is the young modulus? Young modulus is a kind uh is a kind of a pressure is a kind of a pressure. So here you can see there is a length it is the change of the length.

[01:12:21]So length and change of length we can also even cut it. And what we have left that is the force and area. So it is kind of a pressure. So young modulus is this. Fine. And what is the compressibility? Whenever we compress the things, we decrease the pressure in it. Fine. So or we uh decreasing or we get some change in the volume. Okay. The change is volume is happening and the pressure is also something change. So pressure and change both the things. So here you can see there. Yeah.

[01:12:48]Compressibility is this. Fine. And then after that uh we have the things here that is the uh that is the bulk modulus.

[01:12:58]The bulk modulus is again this that is the pressure will get uh that minus P volume divided by the change in the volume and the position ratio is this.

[01:13:07]So we have the option and you can even see the options also. You can see that there is some all every option has a different option. Every option has a different match. So uh by this you can even get that if a a is what second. So see just you can just remember the one thing you can even find one of the easiest thing if you can if you can find the one of the easiest thing now you can directly get your answer because whenever these type of question are come now please see that every option has a different image every option has a different image. So these are the question in which the examiner wants the student get the marks definitely fine.

[01:13:51]Ah this is the question array of monochromatic light again optics rays fine and uh it is also the refraction topic here what is happening that it is the incident ray okay fine and it is the normal and after that it get refracted and after that it get emerged that is the emergent ray that one is the refracted ray that is the emergent ray that is the incident r that is the normal one that is the normal two and it have to be gone like this but it get divert here. So it is the our angle of deviation that is dels. Fine. So it is the angle of the deviation. I'm going to rub here. Sorry guys. Yeah. See students.

[01:14:34]So here we have what? Just read the question first. A monochromatic light.

[01:14:38]What is the monochromatic light? A single color light. Not the white color.

[01:14:42]White color have the seven colors that is known as a spectrum. Fine. So don't confuse with this. Okay. uh now spectrum that is the not the spectrum one that just on the monochromatic light is passing through an equilateral prism.

[01:14:56]Okay. If it is the equilateral plasma and the question not given this 60° then remember whenever we have the equilateral prism the angle is always 60° it is the complete basic math. Fine.

[01:15:09]The refracted ray that is the QR. Okay.

[01:15:12]QR is the refracted ray. Yeah. This one this one is the QR which is parall to the base. Okay. Fine. The question itself said that the QR that is the refracted ray is parall to the base and the diagram is also shows like this and is parall to the base and the angle of incidence is 50. Okay fine. We have the given thing here.

[01:15:31]We have the given thing here that is the angle of incidence is 50°. Fine. If the angle of incidence is the 50° then the angle of deviation we have to find here angle of deviation. Okay sir. One more thing I have uh we know that the angle of prisma is 60° guys. See here here we have the formula that is angle of deviation is equals to the angle of incidence angle of emergence minus with angle of prisma that is a fine. So this is the formula and for this we need to find here what is E and uh for this I have to be write it here that this is our R1 this is our R2 fine and the R1 and R2 both are equal to the angle of prisma and why because of that symmetry things symmetry means that is the equilateral triangle. So we have the R1 and R2 that is the 60° but it is 60°.

[01:16:31]So and both these are equal to in this position. So the R1 and R2 both are equals to 60°.

[01:16:40]Fine. And if this is going to happen then at this point the I is also equals to angle E. Okay. And the I is equals to the E it means the angle E is also equals to 50°. Now just put the value.

[01:16:53]So for finding the angle of deviation we have a angle of incidence that is the 50° and angle of emergence is equals to the 50° and angle of incidence is the 60°. So what is the answer that is the 100 - 60° fine? So the answer we have is 40°.

[01:17:12]So at the 40° our light get deviated. So what here the answer? Ah yes seeh easy fine. You just need to remember the symmetry things here. Okay fine guys.

[01:17:25]So these are some batches we have and uh if you want to being prepared for the 2027 you can even join our Arjuna need uh the trust of the preparation batch and the Arjuna need 2 uh 2.02 02 okay and fine we have the more of the batches you can even just go to our website and you can even see most of the batches there and if you want to join us on the offline center in the Chennai so we have the uh five centers in the chain in the shokagar in the cobador and in the ananagara also so you find so many batches and so many offline centers and offline classes is also available in our institute fine guys and one more thing.

[01:18:07]I have one more thing for you. I know very well. You all are preparing so hard for your examination.

[01:18:16]And some of them decided that it is my just last attempt. Fine. And some of them is just starting their preparation.

[01:18:23]Some of them have the first need paper.

[01:18:25]Some of them have just uh last uh that it is my last uh just preparation. After that I'm not going to try it. Okay. So if any of them is from the last one that after that I'm not going to give that exam that is the need I'm just fed up.

[01:18:42]So for this uh listen student your preparation is not going to be waste that will be useful for many places many many places it's not just that if you are preparing for the need then the syllabus is just only applicable or usable for the need purpose or the MBBS no no never it is used in various manners you can do even more even more better thing okay and after that your future will be more brighter Never uh stagnant yourself on just a single goal.

[01:19:15]Life is very uncertain. Sometimes we are pushing our hard things. We are pushing very well but we can't achieve our goal.

[01:19:23]So at that point of time don't hold your dreams.

[01:19:29]Don't hold it. Just go with the flow and don't go with the flow like uh irrelevantly. Just go with the flow.

[01:19:35]your babu not I'm like not I'm going to say this uh the go with the flow like you have to be do something which your passion which you like to do like the you like the dancing so you can even make the career in the dancing too if the things is not well in the need if you like the things in the gym you can do the gym or do the things or you even want to that sir I am going to use my need preparation need knowledge in some other field so see guys here we have lots of uh uh kind of careers after the need after not the need after not clearing the need see because it is most of the question of the students sir are what if I'm not clear the need my ears are get based no brother your ears are not based that knowledge is very keen knowledge every if you see now if you just uh come out from your society and try to uh discuss these things with your other society members you see You have much knowledge as comparison to them. You are different person. You are already if someone is going some prep now it never going to be waste. It always be a helpful and you can even transform your career from the need or the MBBS to the things like the BSE. You can even pursue in the BSE like the life science biotechnology even the biotechnology is now the time is growing daily.

[01:21:00]That is completely a new kind of a science and the B pharma and after that M pharma, D pharma you can even pursue in the medical things in the uh medicine medicine line allied science BS nursing after BSE nursing you can if you really want to pursue that you have the passion of the army too then you can pursue the BSE nursing too and after the nutrition and the diet why I'm saying this nutrition and diet because you can even see everywhere every people want to be fit We have a trend of fit fitness. You can even use your neat knowledge to be become a good nutritionist and a dietician in by the help of the BSC.

[01:21:40]Guys, your knowledge is not based. It's just your start. Never think like you just going to fail. No. Whenever you feel like now you are going to fail, always remember at the time you are just start in your life. And when you are just starting your life now give a great push and give a great push like you just cross all the boundaries and you are achieve the well thing you don't even get the that thing in your dream and this is the only thing those student who just fed up with your preparation I'm not telling this information to every student because we are pu uh pudians where we just want our student is always stay Happy physics walla is always want the student always stay happy. They never want the student is just focusing on one thing.

[01:22:33]No, if you have the another like you want to prepare for the government exam.

[01:22:38]We have some government exam uh courses also. Don't worry about it brother.

[01:22:44]We are everywhere to support you in the cheaper manner from the society. Fine.

[01:22:50]And after that you can even pursue in the public health health management you can also go into the public health management and you can even join the some uh like uh known nos's fine and after that you can med medical codings medical codings and genetics coding this going to be helpful for you forensic forensic science this is the most interesting branch of the science of the biology also and psychh you can see also that most of the time and now this time the The genation which is upcoming generation is being too introvert not to be extrovert like our past generation.

[01:23:25]So they want more preferred the psychologist. So you can even pursue with the psychological tools psychologist and after that you can healthcare IT sector these are also bombing in now time really it is also very very important and the researches and the academics if you ever want to join just do the research and become the doctorate in the singles.

[01:23:46]Guys remember be the dynamic. Don't be stagnant in your life. If you being the dynamic, you always achieve your life. You always get very best thing ever in your life. I just want you to be the great person in your life. Fine. And I am proud of you. And Jin, we will meet you soon. Bye-bye.

[01:24:11]Take care.