A) less than 1000 Hz
B) greater than 1000 Hz
C) equal to 1000 Hz
D) no sound is heard
Correct Answer: A
Solution :
Sound heard : \[{{f}_{1}}={{f}_{0}}\left( \frac{v}{v+{{v}_{s}}} \right)\] \[{{v}_{s}}=10\,m{{s}^{-1}}\] \[{{f}_{1}}=\left( \frac{330}{330+10} \right)\times 1000\] \[{{f}_{1}}=\frac{33}{34}\times 1000\] is less than 1000 Hz.
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