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A car is moving towards a high cliff. Th...

A car is moving towards a high cliff. The car driver sounds a horn of frequency f. The realected sound heard by the driver has a frequency 2f. If v be the velocity of sound , then the velocity of the car, in the same velocity units will be

A

`v/2`

B

`v/(sqrt2)`

C

`v/4`

D

`v/3`

Text Solution

Verified by Experts

The correct Answer is:
D
In case of reflection from a stationary cliff,
`f'=((v+v_(0))/(v-v_(0)))f=2fthereforev_(0)=v/3`
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VMC MODULES ENGLISH-JEE MAIN REVISION TEST - 22 JEE - 2020-PHYSICS
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