MHT CET Physics question

With what velocity an observer should move relative to a stationary source so that a sound of double the frequency of source is heard by an observer? [MHT-CET 2022]

(A)Same as velocity of sound towards the sourceCorrect
(B)Twice the velocity of sound towards the source
(C)Half the velocity of sound towards the source
(D)Same as velocity of sound away from the source

Answer: (A)

Solution

gives , directed towards the source; twice or half the speed of sound would give or ,

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Question ID VK-068707