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Question

The physical quantity upon which the loudness of the sound depends :


A

pitch

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B

intensity

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C

amplitude

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D

frequency

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Solution

The correct option is C

amplitude


The explanation for the correct option

Option C: amplitude

  1. The loudness of a sound wave depends on its amplitude.
  2. Amplitude is the magnitude of maximum displacement of a vibrating particle about its mean position.
  3. The higher the amplitude, the higher will be the loudness.

The explanation of incorrect options :

Option A: pitch

The Pitch of the sound is determined by the frequency and wavelength of the sound wave.

Option B: Intensity

The amount of sound energy passing through an area each second is called the intensity of sound.

Option D: Frequency

It is the number of compressions or the number of rarefactions occurring per second.

Hence, the correct option is ( C ), amplitude.


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