MCQs on Oscillations and Waves

MCQs on Oscillations and Waves

Calculate the amplitude for a SHM using the equation x = 3sin2pt + 4cos3pt

(a) 3

(b) 5

(c) 4

(d) 7

Answer: (b) 5

What is the constant of propotionality of an oscillator if the damping force is directly propotional to the velocity

(a) kg.s^-1

(b) kg.m.s^-1

(c) kg.s

(d) kg.m.s^-2

Answer: (a) kg.s^-1

What is the phase difference between the prongs of the tuning fork

(a) 5π

(b) π

(c) 2π

(d) 3π

Answer: (b) π

What is the change in the phase if a wave is reflected from a denser medium

(a) 3π

(b) 0

(c) π

(d) 2π

Answer: (c) π

The observer hears a sound from the source which is moving away from the observer who is stationary. Determine the frequency of the sound

(a) It is halved

(b) It remains the same

(c) It reaches infinity

(d) It gets doubled

Answer: (a) It is halved

The length of the pendulum which is displaying SHM is increased by 21%. Calculate the percentage increase in the periodic time of the pendulum.

(a) 21%

(b) 10%

(c) 11%

(d) 42%

Answer: (b) 10%

Which of the following does not exhibit polarization

(a) Longitudinal wave in a gas

(b) Transverse wave in a gas

(c) Neither (a) nor (b)

(d) Both (a) and (b)

Answer: (a) Longitudinal wave in a gas