A) 753 Hz
B) 666 Hz
C) 500 Hz
D) 333 Hz
Correct Answer: B
Solution :
Frequency of sound source \[=\,\,\frac{2\,V}{2\,L}\] \[=\,\,\frac{330}{50\,\times \,{{10}^{-2}}}\,=\,660\,Hz\] Speed of observer \[=\,\,\frac{10\,\,\times \,\,5}{18}\,m/s\] Apparent frequency \[=\,\,660\,\left( \frac{330+\frac{50}{18}}{330} \right)\]\[=\,\,2\left[ 330+\frac{50}{18} \right)\,\,\,=\,\,666\,Hz\]You need to login to perform this action.
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