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A sounding body of negligible dimension ...

A sounding body of negligible dimension emiting a frequency of 150 Hz is dropped from a height. During its fall under gravity it passes near a ballon moving up with a constant velocity of 2 m/s . One second after is started to fall , the difference in the frequency observed by the man in ballon just before and just after crossing the body will be (given that velocity of sound = 300 m/s , g = `10 m//s^(2)`)

A

12

B

6

C

8

D

4

Text Solution

Verified by Experts

The correct Answer is:
A
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