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JEE Advanced 2017 Paper 1

Section: Physics

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Question : 11 of 54

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A stationary source emits sound of frequency f0=492Hz. The sound is reflected by a large car approaching the source with a speed of 2ms−1 .The reflected signal is received by the source and superposed with the original. What will be the beat frequency of the resulting signal in Hz? (Given that the speed of sound in air is 330ms−1 and the car reflects the sound at the frequency it has received).

[JEE Adv 2017 P1]

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