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A source of sound is moving towards a high wall with a speed of 20 m/s. The frequency of the sound produced by the source is 400 Hz. If the speed of the sound is 340 m/s, then the beat frequency heard by a person standing near the wall will be

A

zero

B

5

C

10

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
`n' = n [(v)/(v - v_(s))]`
`n' - n = 25` beats
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