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JEE Main & Advanced Physics Wave Mechanics Question Bank Progressive Waves

  • question_answer
    A wave is represented by the equation                    \[y=7\sin \left( 7\pi t-0.04\,x\pi +\frac{\pi }{3} \right)\]            x is in metres and t is in seconds. The speed of the wave is  [MP PET 1996; AMU (Engg.) 1999]

    A)            175 m/sec                              

    B)            49 pm/sec

    C)            49 pm/sec                             

    D)            0.28 pm/sec

    Correct Answer: A

    Solution :

               \[v=\frac{\text{Co-efficient of }t}{\text{Co-efficient of }x}\]\[=\frac{7\pi }{0.04}=175\,m/s\].


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