home Home » General Study » Physics - Questions and Answers Objective Questions

Physics - Questions and AnswersPage 2

11.

 One light year is approximately equal to (a)1011 km (b)1015 km (c)1016 km (d)1018 km

12.

 Consider the physical quantities 1. Electronics 2. Work 3. Temperature 4. Density Which of the above are scalar quantities ? (a)1, 2 and 3 (b)1, 4 and 3 (c)3, 4 and 2 (d)1, 2, 3 and 4

13.

 Masses of stars and galaxies are usually expressed in terms of (a)Neutron mass (b)Earth mass (c)Solar mass (d)Lunar mass

14.

 Consider the physical quantities 1. Displacement 2. Torque 3. Current density 4. Linear momentum Which of the above are vector quantities ? (a)3, 4 and 2 (b)1, 4 and 3 (c)1, 2 and 3 (d)1, 2, 3 and 4

15.

 Unit of resistance is (a)volt x ampere (b)volt² x ampere (c)volt/ampere (d)ampere/volt

16.

 A noise level of 100 decibel would correspond to (a)just audible sound (b)ordinary conversation (c)sound from a noisy street (d)noise from a machine shop

17.

 Which one of the following is a vector quantity ? (a)Monentum (b)Pressure (c)Energy (d)Work

18.

 Consider the following statements 1. All plane angles are measured in radian. 2. All the solid angles are measured in steradian. 3. Solid angle is measured in steradian. Which of the statement(s) given above is/are correct ? (a)only 1 (b)only 3 (c)2 and 3 (d)1, 2 and 3

19.

 Which of the following physical quantities have the same dimensions ? (a)Angular momentum and work (b)Kinetic energy and velocity (c)Work and torque (d)Potential energy and linear momentum

20.

 Find out the wrong pair (a)Luminous intensity - Candela (b)Amount of substance - Mole (c)Time - Meter (d)Temperature - Kelvin