2. Solved Papers
  3. MGIMS WARDHA

MGIMS WARDHA MGIMS WARDHA Solved Paper-2007

  • question_answer
    A siren emitting sound of frequency 800 Hz is going away from a static listener with a speed of 30 m/s. Frequency of sound to be heard by the listener is (velocity of sound = 330 m/s)

    A) 286.5 Hz                              

    B) 481.2 Hz

    C) 733.3 Hz                              

    D) 644.8 Hz

    Correct Answer: C

    Solution :

    The perceived frequency\[n'\]is \[n'=n\left( \frac{v}{v+{{v}_{s}}} \right)\] \[\therefore \]  \[n=800\left( \frac{330}{330+30} \right)=733.3\,Hz\]


You need to login to perform this action.
You will be redirected in 3 sec spinner