A source is stationary and the observer is in motion along a line joining the source and the observer. If the frequency heard by the observer is 1 % higher than the true frequency, the ratio of velocity of the observer and that of sound in air is:

Question

A source is stationary and the observer is in motion along a line joining the source and the observer. If the frequency heard by the observer is 1 % higher than the true frequency, the ratio of velocity of the observer and that of sound in air is:, 1 : 100, 2 : 100, 3 : 100, 1 : 10

MARKS App · Accepted Answer

As source is stationary and the observer is moving with velocity v o Let velocity of sound v Observed frequency f in Doppler effect is given by f = v + v o v f o Here f = 1 . 01 f o (Given) ⇒ 1 . 01 f o = v + v o v f o ⇒ 101 100 = v + v o v ⇒ v o v = 1 100

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