Questions  

A detector is released from rest under gravity over a source of sound of frequency f0=103Hz . The frequency observed by the detector at time t is plotted in the graph. The speed of sound in air is  (g=10m/sec2):   

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ctaimg
a
330 m/s
b
350 m/s
c
300 m/s
d
310 m/s
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detailed solution

Correct option is C

f=Vs+V0Vsf0⇒f=Vs+gtVsf0=f0+gf0Vst

ctaimg

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