Home Physics Wave and Sound Intensity of Sound, Decibel Scale and Interference The energy per unit area associated with a p…
Physics Wave and Sound Intensity of Sound, Decibel Scale and Interference MCQ (Single Correct)

The energy per unit area associated with a progressive sound wave will be doubled if:

A
the amplitude of the wave is doubled
B
the amplitude of the wave is increased by 50%
C
the amplitude of the wave is increased by 41%
D
the frequency of the wave is increased by 41%

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Verified by Experts
The correct answer is:
C

Energy per unit area associated with progressive sound wave I = 2 π π 2 a 2 n 2 sV if we increase amplitude to times or frequency to times I will be doubled.

So % increment 41% of either amplitude or frequency

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