CBSE Class 11 Physics Oscillations MCQs Set A

Question: In SHM, the acceleration is directly proportional to

a) displacement

b) time

c) linear velocity

d) frequency

Answer: displacement

Question: The displacement of a particle in simple harmonic motion in one time period is [A = amplitude]

a) Zero

b) 4 A

c) 2 A

d) A

Answer: Zero

Question: For a body executing simple harmonic motion, which parameter comes out to be non-periodic ?

a) None of these

b) Velocity

c) Displacement

d) Acceleration

Answer: None of these

Question: A system exhibiting SHM must possess

a) elasticity as well as inertia

b) elasticity, inertia and an external force

c) elasticity only

d) inertia only

Answer: elasticity as well as inertia

Question: A particle moves in a circular path with a uniform speed. Its motion is

a) periodic

b) oscillatory

c) simple harmonic

d) angular simple harmonic

Answer: periodic

Question: The motion which is not simple harmonic is

a) motion of a planet around the Sun

b) oscillation of liquid column in a U-tube

c) motion of simple pendulum

d) vertical oscillations of a spring

Answer: motion of a planet around the Sun

Question: Select the incorrect statement(s) from the following.

I. A simple harmonic motion is necessarily periodic.

II. A simple harmonic motion may be oscillatory

III. An oscillatory motion is necessarily periodic

a) II and III

b) I and II

c) I only

d) I and III

Answer: II and III

Question: Suppose a tunnel is dug along a diameter of the earth. A particle is dropped from a point, a distance h directly above the tunnel, the motion of the particle is

a) oscillatory

b) simple harmonic

c) parabolic

d) non-periodic

Answer: oscillatory

Question: The graph plotted between the velocity and displacement from mean position of a particle executing SHM is

a) ellipse

b) straight line

c) circle

d) parabola

Answer: ellipse

Question: A body executing linear simple harmonic motion has a velocity of 3 m/s when its displacement is 4 cm and a velocity of 4 m/s when its displacement is 3 cm. What is the amplitude of oscillation ?

a) 5 cm

b) 7.5 cm

c) 10 cm

d) 12.5 cm

Answer: 5 cm

Question: Assertion : A particle executing simple harmonic motion comes to rest at the extreme positions .

Reason : The resultant force on the particle is zero at these positions

a) Assertion is correct, reason is incorrect

b) Assertion is incorrect, reason is correct

c) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

d) Assertion is correct, reason is correct; reason is a correct explanation for assertion

Answer: Assertion is correct, reason is incorrect

Question: The total energy of a particle executing S.H.M. is proportional to

a) square of amplitude of motion

b) velocity in equilibrium position

c) frequency of oscillation

d) displacement from equilibrium position

Answer: square of amplitude of motion

Question: Which of the following is true about total mechanical energy of SHM ?

a) It is never zero

b) It is always zero

c) It is zero at extreme position

d) It is zero at mean position.

Answer: It is never zero

Question: Assertion : The graph of total energy of a particle in SHM w.r.t. position is a straight line with zero slope.

Reason : Total energy of particle in SHM remains constant throughout its motion.

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion

b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

c) Assertion is correct, reason is incorrect

d) Assertion is incorrect, reason is correct.

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question: A body executes simple harmonic motion. The potential energy (P.E.), the kinetic energy (K.E.) and total energy (T.E.) are measured as a function of displacement x. Which of the following statement is true?

a) K.E. is maximum when x = 0.

b) T.E. is zero when x = 0.

c) K.E. is maximum when x is maximum

d) P.E. is maximum when x = 0.

Answer: K.E. is maximum when x = 0.

Question: The total energy of the particle executing simple harmonic motion of amplitude A is 100 J. At a distance of 0.707 A from the mean position, its kinetic energy is

a) 50 J

b) 100 J

c) 12.5 J

d) 25 J

Answer: 50 J

Question: When the displacement of a particle executing simple harmonic motion is half of its amplitude, the ratio of its kinetic energy to potential energy is

a) 3 : 1

b) 1 : 2

c) 2 : 1

d) 1 : 3

Answer: 3 : 1

Question: If the maximum velocity and acceleration of a particle executing SHM are equal in magnitude, the time period will be

a) 6.28 sec

b) 12.56 sec

c) 3.14 sec

d) 1.57 sec

Answer: 6.28 sec

Question: A simple pendulum oscillates in air with time period T and amplitude A. As the time passes

a) T remains same and A decreases

b) T decreases and A is constant

c) T increases and A is constant

d) T and A both decrease

Answer: T remains same and A decreases

Question: Which of the following will change the time period as they are taken to moon?

a) A simple pendulum

b) A torsional pendulum

c) A physical pendulum

d) A spring-mass system

Answer: A simple pendulum

Question: For an oscillating simple pendulum, the tension in the string is

a) maximum at mean position

b) constant throughout the motion

c) cannot be predicted

d) maximum at extreme position

Answer: maximum at mean position