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A whistle revolves is a circle with angu...

A whistle revolves is a circle with angular velocity w= 20 rad/s using a string of length 50 cm. If the actual frequency of sound from the whistle is 385 Hz. Then the minimum frequency heard by the observer far away from the centre is ( velocity of sound v=340 m/s)

A

385 Hz

B

374 Hz

C

394 Hz

D

333 Hz

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The correct Answer is:
B
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A whistle revolves in a circle with an angular speed of 20 rad//sec using a string of length 50 cm . If the frequency of sound from the whistle is 385 Hz , then what is the minimum frequency heard by an observer which is far away from the centre in the same plane? v=340m//s

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A whistle of frequency 500 Hz is rotated in a circle of radius cne metre with an angular speed of 10 radian/sec. Calculate the lowest and the highest frequency heard by a listener at a long distance away at rest with respect to the centre of the circle ? (Velocity of sound = 340m/s)

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AAKASH INSTITUTE ENGLISH-WAVES-ASSIGNMENT ( SECTION-C ( Previous year Questions ))
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