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As shown in the figure two sources produ...

As shown in the figure two sources producing sound Sr and Sn (velocity of sound 360 m/sec) each producing sound of frequency 200 Hz. `S_(1)` is rotating anti clock wise where as `S_n` is approaching observer O each with a speed 10 m/sec. (neglect radius of circular path of `S_1`), then calculate

If O is approaching `S_(1)` with a speed 10 m/sec. Number of beats received by .O. per second when `S_(1)` is at A, (nearly)

A

4 beats/sec

B

5.5 beats/sec

C

3 beats/sec

D

beats cannot be distinguished

Text Solution

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The correct Answer is:
B
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