A) 720 Hz
B) 555.5 Hz
C) 550 Hz
D) 500 Hz
Correct Answer: A
Solution :
From the figure, it is clear that Frequency of reflected sound heard by the driver. \[n'=n\,\left[ \frac{v-(-{{v}_{o}})}{v-{{v}_{s}}} \right]=n\,\left[ \frac{v+{{v}_{o}}}{v-{{v}_{s}}} \right]=n\,\left[ \frac{v+{{v}_{car}}}{v-{{v}_{car}}} \right]\] \[=600\,\left[ \frac{330+30}{330-30} \right]=720\,Hz.\]You need to login to perform this action.
You will be redirected in
3 sec