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A vehicle with a horn of frequency n is ...

A vehicle with a horn of frequency n is moving with a velocity of 30m/s in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency `n + n_(1)` . Then (if the sound velocity in air is 300 m/s)........ .

A

`n_(1) = 10`n

B

`n_(1) = 0`

C

`n_(1) = -0.1 n`

D

`n_(1) = 0.1` n

Text Solution

Verified by Experts

The correct Answer is:
B
No Doppler effect is observed if the source moves perpendicular to the line joining the source and the observer. Therefore, the correct choice is (b).
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FULL MARKS-WAVES -Additional Questions Solved
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