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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. 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
2. In which medium the speed of sound is maximum at a temperature of around 20ºC?
3. Decibel unit is used to measure
4. Which one of the following does a TV remote control unit use to operate a TV set?
5. When T.V. is switched on
6. Ultrasonics are sound waves of frequency
7. As per the WHO, the safe noise level for a city is
8. 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?
9. How much should minimum distance be between the source of sound and reflecting surface, so that an echo can be heard clearly?
10. Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature. Code
11. A biotechnique in which ultrasonic sound is used
12. What is the purpose of 'evolved Laser Interferometer Space Antenna (eLISA)' project?
13. In television broadcast, the picture signals are transmitted by
14. 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.
15. Which type of electromagnetic radiation is used in the remote control of a television?
16. 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.
17. Two astronauts cannot hear each other on the Moon's surface, because
18. The technique used to transmit audio signals in television broadcast is
19. 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
20. If Va, Vw and Vs respectively are the speed of sound in air, water and steel, then
21. Which of the following has the longest wavelength?
22. The tolerable limit of noise for human being is around
23. Sound above what level (in decibel) is considered hazardous noise pollution?
24. Put in ascending order the speed of sound in the mediums.
1. Water 2. Steel
3. Nitrogen
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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