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A whistle of frequency 540 Hz rotates in a horizontal circle of radius 2 m at an angular speed of 15 rad/s. The highest frequency heard by a listener at rest with respect to the centre of circle (velocity of sound in air is 330 ms^–1).

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509 Hz

594 Hz

598 Hz

602 Hz

answer is D.

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Detailed Solution

$n^{1} = n [\frac{v}{v - rω}] = 540 [\frac{330}{330 - 2 \times 15}] = 594 Hz$

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