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General Physics Previously Asked Questions: Sound
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General Physics Previously Asked Questions: Sound
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25 Questions

1. In which medium the speed of sound is maximum at a temperature of around 20ºC?
2. The optimum sound level for human beings is
3. Consider the following statements.
1. The heart vibrates at infrasonic.
2. The speed of sound is more in gas than in liquid and solid.
3. Mach number is used to describe the speed of sound.
4. Ultrasonic sound has frequency more than 20,000 Hz. Of these statements.
4. In which of the following option sound may not be across travel?
5. Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature. Code
6. Ultrasonics are sound waves of frequency
7. Decibel is used to measure
8. When T.V. is switched on
9. The walls of the ball, built for music concerts should
10. In television broadcast, the picture signals are transmitted by
11. Put in ascending order the speed of sound in the mediums.
1. Water 2. Steel
3. Nitrogen
12. The velocity of sound in air is approximately
13. What is the decibel level of sound produced by two persons in conversation?
14. Consider the following statements about ultrasonic waves.
1. They can destroy insects.
2. They can clean clothes by removing dust.
3. They can be used to treat diseases.
4. They can control automatic doors. Of the above statements.
15. Assertion (A): A jet aircraft moving at mach number equal to 1 travels faster at an altitude of 15 km than while moving at mach number equal to 1 near the sea level. Reason (R): The velocity of sound depends on the temperature of the surrounding medium. Code
16. The velocity of sound is maximum in
17. What is the purpose of 'evolved Laser Interferometer Space Antenna (eLISA)' project?
18. Two astronauts cannot hear each other on the Moon's surface, because
19. A worker was working on the rail track. A boy at a distance holds his ear near the rail track. This boy was able to hear sound of the blow of workman twice. It is because of
20. How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?
21. Sound waves travel fastest in
22. Consider the following statements.
1. A widely used musical scale called diatomic scale has seven frequencies.
2. The frequency of the tone Sa is 256 Hz and that of Ni is 512 Hz. Which of the statements given above is/are correct?
23. Sound above what level (in decibel) is considered hazardous noise pollution?
24. A radio station broadcast at 30 metre band. The frequency of the carrier wave transmitted by this station is
25. Which of the following has the longest wavelength?

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