SIGNIFICANT FIGURES One Shot 🔥 NEET 2026 Physics | All PYQs & Tricks by Dr. BM Sir

Ajouté : 2026-05-12

[00:00:00]Hello dear students need 2026 your question based on the concept of significant figures how solve this problem answer each side of a metallic cube having the mass 5.580 kg is measured to be 9.6 6 cm. Keeping on the significant figures in view, the density of the material of the cube can be best expressed as X into 10^ 3 KZ.

[00:00:43]What should the value of x value exact in keeping in view of the significant figures?

[00:00:54]So, row is equal to mass by volume.

[00:00:58]So, mass is 5.5.0 kgide by volume is length of the uh since the length of the cube is 9 0 cm. So, this is 9.0 cm cube. You just find out it value. So that is 5.80 / 10 729 10 - 6 m cube. If this is 0.76543t approximately then 10^ 6 kg per meter.

[00:01:29]Okay. So in this case when this is the application of the significant fields while applying in the division so in the during the division so the answers should be expressed in the terms of least significant figures answers should be expressed in the terms of least significant figure least significant figures express so in this case the significant figures is 5.58 significant figure 1 2 3 4 four significant figure. So 9.0 cm significant two significant figures. So answer in terms of two significant digits. So this can be best expressed in terms of a into 10^ k while expressing expressing the significant figures. The number must be expressed number must be expressed in terms of m into 10 ^ k and a1 m should be 1 is less than m is less than 10 and k is an integer.

[00:02:34]This is the integer.

[00:02:38]So in this case uh so we have to express in terms of two significant digits. This is the four significant digit on the numerator denominator is two significant digit. So answer should be expressed in terms of two significant digits. So in this case so 7.6 so we have to express in terms of two significance digits. So after the two sign just you just see this is four five since we have to express in terms of two significant digits just you just see the after that result six after 5 if it is less than five then remain as such if it is greater than five the this number should be increased by one if it is equal to five you just of the number according to NC rule nate rule How to rounding of the significant figures? A rounding of the number into now the number of digits how it can be rounded just in if it is the digits which is to be rounded.

[00:03:50]Next one if it is greater than five the digit to be rounded increased by one. If it is digit to be rounded the next one is less than five it remain uncheed and if it is equal to five sig you just see the next digit if it is equal to five you just see the digit if it is then remain as such if it is not it is by one according to NC so if it is uh equal to five the digit which is to be uh the two digit two we have to express with the two two two digit digits. So just next one is if it is five the digit to be rounded if it is even it will remain as such. So NC answer that is I have extended this answer that is equal to 7.6. Thank you very much.