NCERT Solutions for Class 11 Physics Chapter 2 - Units and Measurements

NCERT Solutions for Class 11 NCERT Solutions for Class 11 Physics 2. Units and Measurements

The NCERT Solutions for Class 11 Physics Chapter 2 - Units and Measurements have been made available here in a simple and easy to understand format. So, if you are facing difficulty in getting your concepts clear for the Chapter Units and Measurements, then these Solutions are sure to help you. Comprising of answers to important questions of the Chapter, you can study these Solutions to clear your doubts and strengthen your concepts.

Our NCERT Solutions for Chapter 2 of the Physics have been expertly created by subject experts of the Goprep. Further, extensive research is done to make these Solutions reliable and effective for the Physics exam preparation. Given below are the important topics that we have covered in Our NCERT Solutions to help students understand the concepts better.

These include the following:

The international system of units
Measurement of length
Measurement of mass
Measurement of time
Accuracy, the precision of instruments and errors in measurement
Significant figures
Dimensions of physical quantities
Dimensional formulae and dimensional equations
Dimensional analysis and its applications.

NCERT Solutions for Class 11 Physics Chapter 2 - Units and Measurements

Class 11th|NCERT - Physics Part-IChapter 2 - Units and Measurements

Q. 1 A

Fill in the Blanks

A. The volume of a cube of side 1 cm is equal to.....m³

Q. 1 B

The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ...(mm)²

Q. 1 C

A vehicle moving with a speed of 18 km h^–1 covers....m in 1 s.

Q. 1 D

The relative density of lead is 11.3. Its density is ....g cm^–3 or ....kg m^–3.

Q. 2 A

Fill in the blanks by suitable conversion of units.

A. 1 kg m² s^-2 = ....g cm² s^-2

Q. 2 B

1 m =..... ly

Q. 2 C

3.0 m s^-2 =.... km h^-2

Q. 2 D

Convert G = 6.67 × 10^–11 N m² kg =.... (cm)³ s^–2 g^–1.

Q. 3

A calorie is a unit of heat or energy and it equals about 4.2 J where 1J = 1 kg m² s^–2.Suppose we employ a system of units in which the unit of mass equals kg, the unit of length equals m, the unit of time is s. Show that a calorie has a magnitude 4.2 in terms of the new units.

Q. 4

Explain this statement clearly:

“To call a dimensional quantity ‘large’ or ‘small’ is meaningless without specifying a standard for comparison”. In view of this, reframe the following statements wherever necessary:

A. Atoms are very small objects

B. A jet plane moves with great speed.

C. The mass of Jupiter is very large.

D. The air inside this room contains a large number of molecules.

E. A proton is much more massive than an electron.

F. The speed of sound is much smaller than the speed of light.

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NCERT - Physics Part-IClass 11th , NCERT

Chapter 1 - Physical World

Chapter 2 - Units and Measurements

Chapter 3 - Motion in a Straight Line

Chapter 4 - Motion in a Plane