NEET Physics Free Damped Forced Oscillations and Resonance MCQs Set A

Question:

a) forced oscillations

b) free oscillations

c) coupled oscillations

d) maintained oscillations

Answer: forced oscillations

Question: In case of a forced vibration, the resonance wave becomes very sharp when the

a) damping force is small

b) restoring force is small

c) quality factor is small

d) applied periodic force is small

Answer: damping force is small

Question: What is the amplitude of simple harmonic motion at resonance in the ideal case of zero damping?

a) Infinite

b) 1

c) – 1

d) Zero

Answer: Infinite

Question:

a) damped oscillator

b) forced oscillator

c) non linear oscillator

d) simple harmonic oscillator

Answer: damped oscillator

Question:  In case of sustained forced oscillations the amplitude ofN oscillations

a) decreases linearly

b) decreases sinusoidally

c) decreases exponentially

d) always remains constant

Answer: decreases linearly

Question: The frequency of the simple harmonic motion attained in forced oscillations, after the forced oscillation die out, is

a) the frequency of the driving force

b) double the frequency of the driving force

c) double the natural frequency of the particle

d) the natural frequency of the particle

Answer:  the frequency of the driving force

Question:

a) (A) - (5), (B) - (2), (C) - (3), (D) - (1, 4)

b) (A) - (1), (B) - (2), (C) - (3), (D) - (4)

c) (A) - (1, 3), (B) - (2, 5), (C) - (3), (D) - (4, 5)

d) (A) - (1), (B) - (3), (C) - (2, 4), (D) - (5)

Answer: (A) - (5), (B) - (2), (C) - (3), (D) - (1, 4)

Question: Choose the false statement(s) for a forced oscillation.
I. Displacement amplitude of an oscillator is independent of the angular frequency of the driving force.
II. The amplitude tends to infinity when the driving frequency equals the natural frequency.
III. Maximum possible amplitude for a given driving frequency is governed by the driving frequency and the damping

a) I only

b) I and II

c) II only

d) I, II and III

Answer: I only

Question: Assertion: Amplitude of a forced vibration can never reach infinity.
Reason: The driving frequency cannot be increased beyond a certain limit.

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:

a) All of these

b) shape of the block

c) size of the block

d) viscosity of the medium

Answer: All of these

Question:

a) 3³

b) 3²

c) 2³

d) 13

Answer: 3³

Question:

a)

b)

c)

d)

Answer:

 More Questions..........................................................

Question:

a) 9 unit

b) 18 unit

c) 36 unit

d) 2 unit

Answer: 9 unit

Question:  A pendulum with time period of 1s is losing energy. At  certain time its energy is 45 J. If after completing 15 oscillations, its energy has become 15 J, its damping constant (in s^–1) is :

a)

b)

c)

d) 2

Answer:

Question:  In damped oscillations, the amplitude of oscillations is reduced to one-third of its inital value a₀ at the end of 100 oscillations. When the oscillator completes 200 oscillations, its amplitude must be

a)

b)

c)

d)

Answer:

Question:

a) (A) - (3), (B) - (4), (C) - (1), (D) - (2)

b) (A) - (1), (B) - (3), (C) - (2), (D) - (4)

c) (A) - (3), (B) - (2), (C) - (4), (D) - (1)

d) (A) - (2), (B) - (3), (C) - (4), (D) - (1)

Answer: (A) - (3), (B) - (4), (C) - (1), (D) - (2)

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:

a) b² = 4ac

b) b² = 7ac

c) b² < 4ac

d) b² = 5ac

Answer:  b² = 4ac

Question:

a)

b)

c)

d) b

Answer: