A curve is plotted to represent the dependence of the ratio of the received frequency f to the frequency f0 emitted by the source on the ratio of the speed of observer Vob to the speed of sound Vsound in a situation in which an observer is moving towards a stationary sound source. The curve is best represented by:
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a
b
c
d
answer is A.
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Detailed Solution
f = f0(1+VobVsound) ⇒ff0 = 1+VobVsound(straight line);when VobVsound = 0; ff0 = 1and as VobVsound →1 ⇒ff0→2