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J & K CET Medical J & K - CET Medical Solved Paper-2013

  • question_answer
    A whistle with frequency 1020 Hz is blown at a station. A man travelling in train moving towards the station at 30 m/s hears the sound of the whistle. If the speed of sound is 340 m/s, the apparent frequency heard by him is

    A)  1020 Hz          

    B)  1110 Hz

    C)  2040 Hz          

    D)  610 Hz

    Correct Answer: B

    Solution :

     Appart frequency\[n=n\left[ \frac{v+{{v}_{0}}}{v} \right]\] \[n=1020\left[ \frac{340+30}{340} \right]\] \[n=1020\times 108.8\] \[n=1110\text{ }Hz\]


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