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An engine is moving on a circular track ...

An engine is moving on a circular track with a constant speed. It is blowing a whistle of frequency `500 Hz`. The frequency received by an observer standing stationary at the centre of the track is

A

`500 Hz`

B

More than 500 Hz

C

Less than 500 H

D

More or less than 500 Hz depending on the actual speed of the engine

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The correct Answer is:
A
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