Class 11th| Physics .Multiple Choice Questions

Multiple Choice Questions

1. Physics involves the study of

(a)humans

(b) birds and animals

(a) plants

(d) nature and natural phenomena

(D)is Correct answer.

2. The range of masses we study in Physics is

(a) 10‐³⁰ kg to 10⁵⁵ kg

(b) 10‐³⁰ kg to 10⁶⁰

(c) 10‐²⁷ kg to 10⁵⁵ kg

(d) 10‐²⁷ kg to 10⁶⁰ kg

(A) is Correct answer

3. Size of universe is of the order of

(a) 10¹⁸m

(b)10²⁶m

(c) 10⁴⁰m

(d)10‐¹⁸m

(B) is Correct answer.

4. Time taken by light to cross nuclear diameter is of

the order of

(a) 10²²s

(b)10²⁶m

(c) 10⁴⁰m

(d)10‐¹⁸

(D) is Correct answer.

5. Optical fibers are based on

(a) total internal reflection

(b) refraction

(c) dispersion

(d) none of these

(A) is Correct answer.

6. Generation, propagation and detection of

electromagnetic waves is the basis of

(a)Computers

(b) Reactors

(c)Radioand Television

(d) Lasers

(C) is Correct answer.

7. Force of friction and tension in a string are

(a) gravitational forces

(b) weak forces

(c) electromagnetic forces

(d) nuclear forces

(C) is Correct answer.

8. Inverse square law of distance is followed by

(a) gravitational forces

(b) electromagnetic forces

(c) both (a) and (b) above

(d) neither (a) nor (b)

(C) is Correct answer.

9. Einstein was awarded Nobel Prize in Physics for

(a) Theory of relativity

(b) Law of gravitation

(c) Uncertainty Principle

(d) Photo electricity

(D) is Correct answer.

10. Maxwell is responsible for

(a) amplification of sound waves

(b) law of gravitation

(c) nuclear model of atom

(d) unification of light and electromagnetism

(D) is Correct answer.

11. Which of the following statement is not true?

(a) solar cells may be future source of power fo

cars

(b) radioactivity was discovered by Madam Curie

(c) X-rays were discovered by Roentgen

(d) development is medicine may increase average

life expectancy

(B) is Correct answer

12. The scientific principle involved in laser is

(a) Faraday's law of induction

(b) Newton's law of motion

(c) amplification by population inversion

(d) motion of charged particles in an

electromagnetic field

(C) is Correct answer.

13. The fundamental forces in nature that govern the diverse phenomenon of macroscopic and

microscopic world are

(a) 1

(b) 2

(c) 3

(d) 4

(D) is Correct answer

14. The scientific principle involved in the working

of radio and television is

(a) amplification sound waves

(b) superconductivity

(c) electromagnetic induction

(d) propagation of electromagnetic waves

(D) is Correct answer

15. Who discovered the X-rays ?

(a) J.C. Maxwell

(b)A.Einestin

(c) M. Faraday

(d) W.K. Roentgen

(D) is Correct answer.

16. Which of the following pair is wrongly matched

(a) relative density : hygrometer

(b) refractive constant: refractro-meter

(c) temperature : thermometer

(d) atmospheric pressure: barometer

(A) is Correct answer

17. The scientists, who may be credited with ushering

in a new quantum mechanics, are

(a) Bohr and Fermi (b) Maxwell and Einstein

(c) Bose and Chander Shekhar

(d) Schrodinger and Heisenberg

(D) is Correct answer.