Physic Oscillations and Waves Test Online MCQs

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

2. A particle execute simple harmonic motion with an angular velocity of 3.5 rad/ sec and maximum acceleration 7.5 m/s². The amplitude of oscillation will be:

3. 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:

4. 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:

5. The air column in a pipe which is closed at one end will be in resonance with a vibrating tuning fork at a frequency 260 Hz. The length of the air column is:

6. A transverse wave passes through a string with the equation : y = 10 sin π (0.02x – 2.00t) where x is in meter and t in second. The maximum velocity of the particle in wave motion is:

7. 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:

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

9. 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:

10. Standing waves are produced in 10 m long stretched string. If the string vibrates in 5 segments and wave velocity is 20 m/s then its frequency will be:

11. Two identical springs of spring constant k are connected in series and parallel as shown in figure. A mass M is suspended from them.

The ratio of their frequencies of vertical oscillation will be:

12. 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:

13. At which temperature velocity if sound (at 27°C) doubles?

14. SONAR emits which of the following waves?

15. The frequency of oscillator of the springs as shown in figure will be: