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Question

The intensity of sound is independent of

A
the distance of source from the observer.
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B
the amplitude of the sound.
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C
the maximum displacement of a particle from its mean position.
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D
the wavelength of the sound.
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Solution

The correct option is D the wavelength of the sound.
The intensity of sound is defined as the energy passing through a unit area in unit time. The intensity decreases with the distance of the observer from the source and increases as the amplitude of the sound, i.e., the maximum displacement of a particle from its mean position, is increased. However, the intensity of sound is independent of the wavelength of the sound.

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