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NEET Sample Paper NEET Sample Test Paper-8

  • question_answer
    The driver of a car travelling with speed \[30m/s\]towards a hill, sounds a horns of frequency \[600Hz\]. If the velocity of sound in air is \[330Ws,\]the frequency of reflected sound as heard by the driver is:

    A)  \[720\,Hz\]          

    B)  \[555.5Hz\]

    C)  \[550Hz\]                   

    D)  \[500Hz\]

    Correct Answer: A

    Solution :

    For reflected sound \[F=\left( \frac{V+{{V}_{0}}}{V-{{V}_{0}}} \right)\,\,\,F=\frac{360}{300}\times 600=720Hz\]         


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