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JEE Main & Advanced Physics Wave Mechanics Question Bank Progressive Waves

  • question_answer
    Progressive wave of sound is represented by \[y=a\sin [400\pi \,t-\pi x/6.85]\] where \[x\] is in \[m\] and \[t\] is in sec. Frequency of the wave will be                       [RPMT 1999]

    A)            200 Hz                                     

    B)            400 Hz

    C)            500 Hz                                     

    D)            600 Hz

    Correct Answer: A

    Solution :

               \[n=\frac{\omega }{2\pi }=\frac{400\pi }{2\pi }=200\,\,Hz\]  (As \[\omega \]= 400\[\pi \])


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