NCERT Class 11 Chapter 2 Physics Units and Measurements MCQ

NCERT Class 11 Chapter 2 Physics Units and Measurements MCQ | Questions & Answers: With the help of this article, you can give a try for the NCERT Class 11 Chapter 2 Physics Units and Measurements MCQ Quiz. Make sure that submit the answers at the end to get the instant results.

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1. Which one of the following pairs of quantities and their units is a proper match?

A. Magnetic flux – weber

B. Capacitance – henry

C. Impulse – N/sec

D. Power – farad

2. One second is defined to be equal to

A. 9192631770 periods of the cesium clock

B. 1650763.73 periods of the cesium clock

C. 652189.63 periods of the krypton clock

D. 1650763.73 periods of the krypton clock

3. One yard in SI unit is equal to

A. 0.9144 metre

B. 1.0936 kilometre

C. 1.9144 metre

D. 0.09144 kilometre

4. One pico farad is equal to

A. 10^–12 farad

B. 10^–24 farad

C. 10^–18 farad

D. 10^{–6 farad}

5. ‘Torr’ is the unit of

A. pressure

B. volume

C. density

D. flux

6. Very large distances such as the distance of a Planet or a star from Earth can be measured by

A. Parallax method

B. All of these

C. Millikan’s oil drop method

D. Spectrograph

7. Joule second is a unit of

A. angular momentum

B. torque

C. energy

D. power

8. Temperature can be expressed as derived quantity in terms of

A. None of these

B. mass and time

C. length and mass

D. length, mass and time

9. Unit of specific resistance is

A. ohm – m

B. ohm/m

C. ohm m³

D. ohm/m²

10. Unit of magnetic moment is

A. ampere–metre²

B. weber–metre²

C. ampere–metre

D. weber/metre

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11. Dimensional analysis can be applied to

A. All of these

B. to convert from one system of units to another

C. deduce relations among the physical quantities

D. check the dimensional consistency of equations

12. The dimensions of pressure is equal to

A. energy per unit volume

B. energy

C. force

D. force per unit volume

13. Which is dimensionless?

A. Force/acceleration

B. Velocity/acceleration

C. Energy/work

D. Volume/area

14.

The dimensions of torque are

A. (a)

B. (b)

C. (C)

D. (d)

15. The division of energy by time is X. The dimensional formula of X is same as that of

A. power

B. electric field

C. momentum

D. torque

16. Which of the following is a dimensional constant?

A. Gravitational constan

B. Dielectric constant

C. Refractive index

D. Relative density

17. The dimensions of mobility are CBSE Class 11 Physics Ubits and Measurements (17 Q)

A. (a)

B. (b)

C. (c)

D. (d)

18. The magnitude of the difference between the individual measurement and true value of the quantity is called

A. absolute error

B. relative error

C. None of these

D. percentage error

19. Systematic errors can be

A. either positive or negative

B. negative only

C. positive only

D. None of these

20. Random error can be eliminated by

A. taking large number of observations and then their mean

B. measuring the quantity with more than one instrument

C. eliminating the cause

D. careful observation

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21. Electron volt is a unit of

A. charge

B. potential difference

C. energy

D. magnetic force

22. Light year is a unit of

A. time

B. distance

C. sunlight intensity

D. mass

23. Which of the following pairs has the same dimensions?

A. specific heat and latent heat

B. lmpulse and momentum

C. surface tension and force

D. moment of lnertia and torque

24. Which of the following sets of quantities has the same dimensional formula?

A. Frequency, angular frequency and angular momentum

B. Surface tension, stress and spring constant

C. Acceleration, momentum and retardation

D. Work, energy and torque

25. If C and R denote capacitance and resistance respectively, what will be the dimensions of C x R?

A. [M0L0TA0]

B. [ML0TA-2]

C. [ML0TA2]

D. [MLTA-2]