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A bus is moving with a velocity of 5 ms^...

A bus is moving with a velocity of `5 ms^(-1)` towards a huge wall. The driver sound a horn of frequency 165 Hz. If the speed of sound in air is `335 ms^(-1)`, the number of beats heard per second by a passenger inside the bus will be

A

3

B

4

C

5

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
`v=165` Hz and `v'=(335+5)/(335)xx335/330xx165=170` Hz
`:.` Number of beats `s^(-1) =v'-v=170-165=5`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-WAVE MOTION-Exercise 1
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