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Two sources of sound of the same frequen...

Two sources of sound of the same frequency produce sound intensities `I` and `4I` at a point `P` when used individually. If they are used together such that the sounds from them reach `P` with a phase differenceof `2pi//3`, the intensity at `P` will be

A

`2I`

B

`3I`

C

`4I`

D

`5I`

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The correct Answer is:
B
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