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JEE Main & Advanced Physics Wave Mechanics JEE PYQ-Wave Mechanics

  • question_answer
      An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?                      [AIEEE 2005]

    A)  Zero                

    B)  0.5%

    C)  5%      

    D)       20%

    Correct Answer: D

    Solution :

    [d] Given,
    When observer moves towards the stationary source, then
     
     
    Hence, percentage increase


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