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A closed organ pipe of length L is vibra...

A closed organ pipe of length L is vibrating on a circle of radius t and centre at O in xy plane. A point source of sound S lies in xy plane at a distance 2 R from the point O and emits sound of a given frequnecy .the ratio of maximum frequncey and minimum frequecny recorded by the detector is `11/9 ` and speed of sound is 340 m/s the minimum time intervel in seconds between recording a maximum frequency and minimum frequency is ( take R = 17 m )

A

`1:2`

B

`1:3`

C

`1:1`

D

`2:3`

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The correct Answer is:
B
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