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Sound signal is sent through a composite...

Sound signal is sent through a composite tube as shown in the figure. The radius if the semicircular portion of the tube `r`. Speed of sound in air is `v`. The source of sound is capable of giving vaied frequencies in the range of `v_(1)` and `v_(2)` (where `v_(2) gt v_(1)`). If `n` is an integer then frequency for maximum intensity is given by

A

`(nV)/(r )`

B

`(nV)/(r(pi-2))`

C

`(nV)/(pir)`

D

`(nV)/((r-2)pi)`

Text Solution

Verified by Experts

The correct Answer is:
B
Path differ `Deltax=pir-2r=(pi-2)r`
For nth maximum `Deltax=nlambda` and `lambda=v//f`
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