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

Solving the Oscillations Multiple Choice Questions of Class 11 Physics Chapter 14 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Oscillations Class 11 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 14 Physics Class 11 and cross-check your answers during preparation.

Question 1.
If an simple pendulum oscillates with an amplitude of 50 mm and time period of 2s, then its maximum velocity is
(a) 0.10 m/s
(b) 0.16 m/s
(c) 0.25 m/s
(d) 0.5 m/s

Question 2.
If the frequency of the particle executing S.H.M. is n, the frequency of its kinetic energy becoming maximum is
(a) n/2
(b) n
(c) 2n
(d) 4n

Question 3.
Spring is pulled down by 2 cm. What is amplitude of motion?
(a) 0 cm
(b) 6 cm
(c) 2 cm
(d) cm

Question 4.
The period of thin magnet is 4 sec. if it is divided into two equal halves then the time period of each part will be
(a) 4 sec
(b) 1 sec
(c) 2 sec
(d) 8 sec

Question 5.
The acceleration of particle executing S.H.M. when it is at mean position is
(a) Infinite
(b) Varies
(c) Maximum
(d) Zero

Question 6.
A spring of force constant k is cut into two pieces such that on piece is double the length of the other. Then the long piece will have a force constant of
(a) 2 k/3
(b) 3 k/2
(c) 3 k
(d) 6 k

Question 7.
Particle moves from extreme position to mean position, its
(a) Kinetic energy increases, potential increases decreases
(b) Kinetic energy decreases, potential increases
(c) Both remains constant
(d) Potential energy becomes zero and kinetic energy remains constant

Answer: (a) Kinetic energy increases, potential increases decreases

Question 8.
Grap of potential energy vs. displacement of a S.H. Oscillator is
(a) parabolic
(b) hyperbolic
(c) elliptical
(d) linear

Question 9.
The time-period of S.H.O. is 16 sec. Starting from mean position, its velocity is 0.4 m/s after 2 sec. Its amplitude is
(a) 0.36 m
(b) 0.72 m
(c) 1.44 m
(d) 2.88 m

Question 10.
A simple pendulum is made of a body which is a hollow sphere containing mercury suspended by means of a wire. If a little mercury is drained off, the period of pendulum will
(a) Remain unchanged
(b) Increase
(c) Decrease
(d) Become erratic

Question 11.
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
(a) Increase
(b) Decrease
(c) Remain unaffected
(d) Become infinite

Question 12.
In the case of forced oscillations, which of the following statements is not true?
(a) frequency equals that of external periodic force
(b) amplitude depends upon the damping coefficient
(c) amplitude tends to infinity at resonance
(d) higher the damping coefficient , lower is the amplitude at resonance

Answer: (c) amplitude tends to infinity at resonance

Question 13.
Grap of potential energy vs. displacement of a S.H. Oscillator is
(a) parabolic
(b) hyperbolic
(c) elliptical
(d) linear

Question 14.
The period of oscillation of a simple pendulum of constant length at earths surface is T, it period inside a mine is
(a) Greater than T.
(b) Less than T.
(c) Equal to T.
(d) Cannot be compared

Question 15.
If an simple pendulum oscillates with an amplitude of 50 mm and time period of 2s, then its maximum velocity is
(a) 0.10 m/s
(b) 0.16 m/s
(c) 0.25 m/s
(d) 0.5 m/s

Question 16.
The period of a simple harmonic oscillator is 2 sec. The ratio of its maximum velocity and maximum acceleration is
(a) ∏
(b) 1/∏
(c) 2∏
(d) 4

Question 17.
In damped oscillation, the angular frequency of the oscillator
(a) keeps on decreasing
(b) keeps on increasing
(c) remains the same
(d) fluctuates

Question 18.
A simple pendulum of length l and mass (bob) m is suspended vertically. The string makes an angle q with the vertical. The restoring force acting on the pendulum, is
(a) mg tan θ
(b) mg sin θ
(c) -mg sinθ
(d) -mg cosθ

Question 19.
In simple harmonic motion which statement is wrong.
(a) A body in S.H.M. its velocity maximum at mean position
(b) A body in S.H.M. its K.E. less at extreme position
(c) A body in S.H.M. its acceleration more at extreme position its directions away from mean position
(d) A body in S.H.M its acceleration less at mean position

Answer: (c) A body in S.H.M. its acceleration more at extreme position its directions away from mean position

Question 20.
The period of oscillation of a mass M, having from a spring of force constant k is T. When additional mass m is attached to the spring, the period of oscillation becomes 5T/4. m/M =
(a) 9 : 16
(b) 25 : 16
(c) 25 : 9
(d) 19 : 9