There are three sources of sound of equal intensity with frequencies $400,{\rm{ }}401{\rm{ }}and\,402\,\,vib/sec.$. The number of beats heard per second is

JEE PHYSICS MCQ: WAVES

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There are three  sources of sound of equal intensity with frequencies

400,\mathrm{ }401\mathrm{ }and\,402\,\,vib/sec.

. The number of beats heard per second is

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Correct option: C

2

Option C (2) is correct because the number of beats heard per second is equal to the difference between the highest and lowest frequencies when multiple sound sources of equal intensity are present.

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