Physics Practice: Sound (Mock Test 5 - Ultimate Comprehensive)
1. Sound waves require a ________ for their propagation.
2. The loudness of sound is measured in ________.
3. A high-pitched sound is produced by a body vibrating with ________.
4. The speed of sound in air is approximately ________.
5. Echoes are heard when sound is ________ from a distant obstacle.
6. Audible range of frequency for humans is ________.
7. The maximum displacement of a vibrating body from its mean position is ________.
8. Which of the following is an example of ultrasonic sound use?
9. Sound travels fastest through ________.
10. The time period ($T$) and frequency ($f$) are related as ________.
11. Sound waves cannot travel in a ________.
12. The characteristic of sound that distinguishes a male voice from a female voice is ________.
13. To hear a clear echo, the minimum distance required is about ________.
14. Irregular and unpleasant sound is called ________.
15. Persistence of sound due to multiple reflections is ________.
16. The units of Frequency is ________.
17. Bats use ________ to detect obstacles.
18. The speed of sound depends on the ________ of the medium.
19. In a longitudinal wave, particles vibrate ________ to the direction of wave.
20. Planting trees helps in reducing ________ pollution.