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Question

To and fro motion of an object is called


A

frequency

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B

ampltitude

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C

vibration

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D

time period

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Solution

The correct option is C

vibration


Correct option:(c)

  1. Sound is produced by vibrations or to and fro motion of an object .
  2. Particles of an object vibrate which in turn transfer vibrations to the surroundings upon reaching our ears we hear the sound.
  3. Thus To and fro motion of an object is called vibration.

Incorrect option:(a),(b),(d)

  1. The number of occurrence of a vibration in minute is called frequency or its the rate of vibration of sound.
  2. Amplitude is the maximum displacement of wave on either side of its mean position.
  3. Time taken by wave to complete one oscillation is called time period not vibration.

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