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A small source of sound moves on a circl...

A small source of sound moves on a circle as shown in figure and an observer is sitting at O. Let `v_1,v_2,v_3` be the frequencies heard when the source is at A,B and C respectively.
.

A

`f_(1)gtf_(2)gtf_(3)`

B

`f_(2)gtf_(3)gtf_(1)`

C

`f_(1)=f_(2)gtf_(3)`

D

`f_(2)gtf_(1)gtf_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
At point A, source is moving away
`f_(1)ltf`
At point B, source is coming towards
`f_(2)gtf`
At point C, source is moving `_|_^(r)` to observer
`f_(3)=f`
Hence, `f_(2)gtf_(3)gtf_(1)`.
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