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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. 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.
2. A noise level of 100 decibel would correspond to
3. The tolerable limit of noise for human being is around
4. Put in ascending order the speed of sound in the mediums.
1. Water 2. Steel
3. Nitrogen
5. 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
6. To hear a clear echo, the minimum distance between the reflecting surface and the observer should be
7. Bats can fly during dark nights and also prey. This is because
8. Sound waves
9. How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?
10. When T.V. is switched on
11. The walls of the ball, built for music concerts should
12. In which of the following option sound may not be across travel?
13. The velocity of sound is maximum in
14. Assertion (A): Reveraberation mainly feels in large churches and in other large buildings. Reason (R): The walls, roof and ground may cause multiple sound reflections. Code
15. In which medium the speed of sound is maximum at a temperature of around 20ºC?
16. The optimum sound level for human beings is
17. Which type of electromagnetic radiation is used in the remote control of a television?
18. As per the WHO, the safe noise level for a city is
19. When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in
20. Sound waves travel fastest in
21. Sound waves do not travel 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. Decibel unit is used to measure
24. Which one of the following does a TV remote control unit use to operate a TV set?
25. Consider the following statements.
1. A flute of smaller length produces waves of lower frequency.
2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct?

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