Q.

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s. The speed of sound is 330 m/s. the frequency heard by the observer will be

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a

550 Hz

b

458.3 Hz

c

530 Hz

d

545.5 Hz

answer is A.

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Detailed Solution

n'=n vv−vS⇒n'=500 330330−30=550 Hz
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A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s. The speed of sound is 330 m/s. the frequency heard by the observer will be