# Oscillations MCQ Questions for Class 11 Physics Chapter 14 with Answers

NCERTCOURSE.COM given here the NCERT chapter-wise Multiple Choice Questions from Class 11 Physics book Chapter 14 Oscillations with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Oscillations. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

## Q1. In S.H.M., the particle is

(i) always accelerated
(ii) always retarded.
(iii) neither accelerated nor retarded.
(iv) accelerated and retarded alternately.

(iv) accelerated and retarded alternately.

(i) parabolic
(ii) hyperbolic
(iii) elliptical
(iv) linear

(i) parabolic

## Q3. In the case of forced oscillations, which of the following statements is not true?

(i) frequency equals that of external periodic force
(ii) amplitude depends upon the damping coefficient
(iii) amplitude tends to infinity at resonance
(iv) higher the damping coefficient, lower is the amplitude at resonance

(iii) amplitude tends to infinity at resonance

## Q4. In SHM, the acceleration is directly proportional to

(i) displacement
(ii) time
(iii) linear velocity
(iv) frequency

(i) displacement

## Q5. Which of the following characteristics does not change due to the damping of S.H.M.?

(i) Amplitude
(ii) Time period
(iii) Angular frequency
(iv) Initial phase

(iv) Initial phase

(i) Infinite
(ii) Varies
(iii) Maximum
(iv) Zero

(iv) Zero

## Q7. For a magnet of time period T magnetic moment is M, if the magnetic moment becomes one fourth of the initial value, then the time period of oscillation becomes.

(i) Half of initial value
(ii) One fourth of initial value
(iii) Double of initial value
(iv) Four time initial value

(iii) Double of initial value

## Q8. A system exhibiting SHM must possess

(i) elasticity as well as inertia
(ii) elasticity, inertia and an external force
(iii) elasticity only
(iv) inertia only

(i) elasticity as well as inertia

## Q9. Which of the following quantities connected with S.H.M. do not vary periodically?

(i) Displacement
(ii) Velocity
(iii) Acceleration
(iv) Total energy

(iv) Total energy

(i) 0 cm
(ii) 6 cm
(iii) 2 cm
(iv) cm

(iii) 2 cm

## Q11. In damped oscilation the directions of the restoring force and the resistive force

(i) are the same
(ii) are opposite
(iii) may be same or opposite
(iv) have no relation with each other

(iii) may be same or opposite

## Q12. The motion which is not simple harmonic is

(i) motion of a planet around the Sun
(ii) oscillation of liquid column in a U-tube
(iii) motion of simple pendulum
(iv) vertical oscillations of a spring

(i) motion of a planet around the Sun

## Q13. Resonant vibrations are a special case of:

(i) free vibrations
(ii) natural vibrations
(iii) forced vibrations
(iv) damped vibrations

(iii) forced vibrations

(i) mg tan θ
(ii) mg sin θ
(iii) -mg sinθ
(iv) -mg cosθ

(iii) -mg sinθ

(i) 10%
(ii) 1%
(iii) 21%
(iv) 42%

(i) 10%

## Q16. The graph plotted between the velocity and displacement from mean position of a particle executing SHM is

(i) ellipse
(ii) straight line
(iii) circle
(iv) parabola

(i) ellipse

## Q17. A pendulum clock is in a lift falling freely. Then

(i) it runs slower.
(ii) it runs faster.
(iii) it keeps correct time.
(iv) no oscillations occur and the clock does not operate at all.

(iv) no oscillations occur and the clock does not operate at all.

(i) 0.10 m/s
(ii) 0.16 m/s
(iii) 0.25 m/s
(iv) 0.5 m/s

(ii) 0.16 m/s

## Q19. In SHM, graph of which of the following is a straight line?

(i) T.E. against displacement
(ii) P.E. against displacement
(iii) Acceleration against time
(iv) Velocity against displacement

(i) T.E. against displacement

(i) 50 J
(ii) 100 J
(iii) 12.5 J
(iv) 25 J

(i) 50 J

## Q21. A simple pendulum has time period T on the surface of earth. When it is taken to a height h, then its time period will be

(i) constant
(ii) more than T
(iii) less than
(iv) None of the above

(ii) more than T

(i) parabolic
(ii) hyperbolic
(iii) elliptical
(iv) linear

(i) parabolic

(i) 3 : 1
(ii) 1 : 2
(iii) 2 : 1
(iv) 1 : 3

(i) 3 : l

## Q24. A ball is dropped in a tunnel dug along the diameter of earth. When it is at the centre of earth, then it has

(i) mass
(ii) acceleration
(iii) weight
(iv) kinetic energy

(i) and (iv).

##### Q25. A pendulum suspended from the roof of a train has a period T (When the train is at rest). When the train is accelerating with a uniform acceleration a, the time period of the pendulum will

(i) Increase
(ii) Decrease
(iii) Remain unaffected
(iv) Become infinite

(ii) Decrease

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