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If a body vibrates 20 times in a second,...

If a body vibrates 20 times in a second, then its frequency is 20 Hz.

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The correct Answer is:
true
The number of vibrations completed in one second is called its frequency.
` therefore `As the body is vibrating 20 times in 1 s its frequency is 20 Hz.
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PEARSON IIT JEE FOUNDATION-SOUND-CONCEPT APPLICATION (LEVEL-1)
  1. The unit of frequency is second.

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  2. The time taken to perform 30 vibrations is 30 times the time taken for...

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  3. If a body vibrates 20 times in a second, then its frequency is 20 Hz.

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  4. Sitar, veena and guitar are some instruments.

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  5. The sounds of frequencies greater than 20 kHz are called ultrasonic so...

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  6. Sound travels much faster than light in a given medium.

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  7. The velocity of sound is more in vacuum than in any other medium.

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  8. In general, the voice of a woman has a higher frequency than that of a...

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  9. 1 kHz = Hz.

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  10. The vibratory motion of a tuning fork is in nature.

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  11. The time period of a simple pendulum is independent of of oscillation...

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  12. The loudness of sound is determined by its

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  13. sound is used as a diagnostic tool in medical science.

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  14. Sound needs a to travel.

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  15. Humans are sensitive to sound of loudness from to .

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  16. The loudness of sound with increase in the energy spent to vibrate a ...

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  17. Propagation of sound can be visualized as propagation of in the mediu...

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  18. A frequency of 1 Hz means oscillations per second.

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  19. Ultrasonic sound waves are used in

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  20. The sound produced by a siren given by a company reaches a person on t...

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