Sound Wave MCQ Questions and Answers for Practice

1. When a wave travels through a medium ______.

1. energy is transferred at a constant speed
2. energy is transferred in a periodic manner
3. particles are transferred from one place to another
4. none of these

2. Bats detect the obstacles in their path by receiving the reflected ______.

1. radio waves
2. ultrasonic waves
3. electromagnetic waves
4. infrasonic waves

3. The minimum distance between the source and the reflector, so that an echo is heard is approximately

1. 12 m
2. 15 m
3. 17 m
4. 21 m

4. When sound travels through air, the air particles ______.

1. do not vibrate
2. vibrate but not in any fixed direction
3. vibrate perpendicular to the direction of wave propagation
4. vibrate along the direction of wave propagation

5. Sound waves do not travel through

1. vacuum
2. soild
3. liquid
4. gases

6. Sound waves are _________________ in nature

1. longitudinal
2. transverse
3. partly longitudinal and partly transverse
4. sometimes longitudinal and sometimes transverse

7. The amplitude of a wave is ______.

1. the distance the wave moves in one second
2. the maximum distance moved by the medium particles on either side of the mean position
3. the distance the wave moves in one time period of the wave
4. the distance equal to one wave length

8. The speed of sound in medium depends upon

1. frequency
2. amplitude
3. wavelength
4. properties of the medium

9. Which of the following will remain unchanged when a sound wave travels in air or in water?

1. frequency
2. wavelength
3. amplitude
4. speed

10. _______________ is an example for mechanical wave.

1. radio wave
2. light wave
3. sound wave
4. infrared wave

11. Which of the following quantities is transferred during wave propagation?

1. speed
2. mass
3. energy
4. matter

12. A sound wave is produced when an object

1. accelerates
2. decelerates
3. vibrates
4. remains stationary

13. The wavelength of a wave is measured in

1. metres
2. hertz
3. seconds
4. decibels

14. An echo occurs when a sound wave is

1. absorbed
2. transmitted
3. refracted
4. reflected

15. Another name for the unit Hertz is

1. cycles per second
2. seconds per cycle
3. metres per second
4. decibels