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JEE Main & Advanced Physics Wave Mechanics Question Bank Doppler's Effect

  • question_answer
    A source of sound of frequency 450 cycles/sec is moving towards a stationary observer with 34 m/sec speed. If the speed of sound is 340 m/sec, then the apparent frequency will be                                           [MP PMT 1987]

    A)            410 cycles/sec                      

    B)            500 cycles/sec

    C)            550 cycles/sec                      

    D)            450 cycles/sec

    Correct Answer: B

    Solution :

               \[n'=n\,\left( \frac{v}{v-{{v}_{0}}} \right)=450\,\left( \frac{340}{340-34} \right)=500\]\[cycles/\sec \]


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