Physic Oscillations and Waves Test Online MCQs

1. Energy is not carried by which of the following wave?

2. Simple pendulum is executing simple harmonic motion with time period T. If the length of the pendulum is increased by 21%, then the increase in the time period of the pendulum of the increased length is:

3. The equation of displacement of two waves are given as

y₁ = 10 sin (3πt + π/3)

y² = 5 (sin 3πt + √3 cos 3πt)

Then, the ratio of their amplitude will be:

4. A sings with a frequency (n) and B sings with a frequency 1/8 that of A. If the energy remains the same and the amplitude of A is a, then amplitude of B will be:

5. If the time period of oscillation of mass m suspended from a spring is 2 sec, the time period of mass 4 m will be:

6. A resonance in air column of length 20 cm resonates with a tuning fork of frequency 450 Hz. Ignoring end correction, the velocity of sound in air is:

7. An object producing a pitch of 1200 Hz is moving with a velocity of 50 m/s towards a stationary person. The velocity of sound is 350 m/s. The frequency of sound heard by the stationary person is:

8. The tension in a piano wire is 10 N. The tension in a piano wire to produce a node of double frequency is:

9. If a simple pendulum oscillates with an amplitude of 50 mm and time period of 2 sec then its maximum velocity is:

10. Newton’s formula for the velocity of sound in gas is:

11. A horizontal platform with an object placed on it is executing simple harmonic motion in the vertical direction. The amplitude of oscillation is 3.92 x 10⁻³m. What should be the least period of these oscillations, so that the object is not detached from the platform?

12. Two sound waves have phase difference of 60°, then they will have the path difference of:

13. Which one of the following statement is not correct for a particle executing S.H.M?

14. A wave is represented by the equation y = a sin (0.01x – 2t) where a and x are t in second. Velocity of propagation of the wave is:

15. If the vibrations of a string are to be increased be a factor of two, then tension in the string should be made: