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NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
    A whistle giving out 450Hz, approaches a stationary observer at a speed of\[33m/s\]. The frequency heard by the observer in Hz is (speed of sound\[=330m/s\])

    A)  409                

    B)  429

    C)  517                

    D)  500

    Correct Answer: D

    Solution :

        As apparent frequency \[{{n}_{1}}=n\left( \frac{V}{V-{{V}_{s}}} \right)=450\left[ \frac{330}{330-33} \right]=500Hz\]


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