A) 1000 Hz
B) 1500 Hz
C) 2000 Hz
D) 4500 Hz
Correct Answer: B
Solution :
Frequency received by the observer \[v=v\left( \frac{v}{v+u} \right)=v\left( \frac{1}{1+\frac{u}{v}} \right)\] \[=3000\left( \frac{1}{1+\frac{1}{2}} \right)\] \[=300\frac{1}{3/2}\] \[=3000\times \frac{2}{3}\] = 2000 HzYou need to login to perform this action.
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