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 beA. 2lB. 3lC. 4lD. 5l

Two sources of sound of the same frequency produce sound intensities `

1.	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 beA. 2lB. 3lC. 4lD. 5l
Answer» Correct Answer - B `I=I_(1)+I_(2)+2sqrt(I_(1)I_(2))cosphi` `=I+4I+2sqrt(Ixx4I)xx"cos"(2pi)/3` `=5I+4Ixx(-1/2)=5I-2I=3I`

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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 beA. 2lB. 3lC. 4lD. 5l

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