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A source of sound of frequency 256 Hz is...

A source of sound of frequency 256 Hz is moving towards a wall with a velocity of 5 m/s. How many beats per second will be heard by an observer O standing in such a positoin that the source S is between O and wall? `(c=330(m)/(s))`

A

`(256xx330)/325-(256xx330)/325`

B

`256-(256x330)/325`

C

`(256xx330)/325-(256xx330)/325`

D

`(256xx330)/325-256`

Text Solution

Verified by Experts

The correct Answer is:
C
No beat is heard, because frequency received by listener directly from the source and that received on reflection from the wall is same
`=(256xx330)/(330-5) Hz`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE MOTION-Exercise 2
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