Physics Practice: Sound (Mock Test 2 - Intermediate)
1. A RADAR sends a signal to an aeroplane and receives it back after $0.02 \text{ ms}$. If speed of light is $3 \times 10^8 \text{ m/s}$, the distance of the plane is:
2. When we tighten the string of a guitar, its ________ increases.
3. Two sounds A and B have the same amplitude but the frequency of A is double that of B. Which sound is shriller?
4. Which of the following is an application of Echo?
5. The ratio of the frequencies of the fundamental note and its first overtone in a stretched string is:
6. A tuning fork of frequency $256 \text{ Hz}$ is held over a resonance column. Resonance is first observed when the length of the air column is $32 \text{ cm}$. The velocity of sound in air is approximately:
7. Damped vibrations are produced because of the ________ of the surrounding medium.
8. Which of the following represents the quality of sound?
9. Resonance is a special case of:
10. If the distance between the source and listener is doubled, the intensity of sound becomes:
11. Waves produced on the surface of water are:
12. The frequency of a note is $n$ and its wavelength is $\lambda$. The speed of the wave is:
13. Which of the following stringed instruments works on the principle of resonance?
14. The sensation of loudness depends on the ________ of the listener.
15. Infrasonic sound has a frequency ________.
16. The speed of sound in water is ________ than that in air.
17. For a vibrating string, if length is halved, frequency becomes:
18. We can recognize the voice of a friend over phone because of its ________.
19. If the intensity of sound increases by 100 times, the loudness increases by (in dB):
20. The first overtone of a stretched string is called its: