A) 545 Hz
B) 580 Hz
C) 458.3 Hz
D) 550 Hz
Correct Answer: D
Solution :
From Dopplers effect, the perceived frequency \[(f)\]is given by \[f=f\frac{v}{v-{{v}_{s}}}\] where\[{{v}_{s}}\]is velocity of source, v the speed of sound and / the original frequency. Given,\[f=500\,Hz,{{v}_{s}}=30\,m/s,v=330\,m/s\] \[f=500\times \frac{330}{330-30}\] \[f=500\times \frac{330}{300}=500\,Hz\] Note: When source is moving towards observer perceived frequency increases.You need to login to perform this action.
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