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

  • question_answer
    A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by
    What is the speed of the travelling wave moving in the positive x direction?
    (x and t are in meter and second, respectively.)       [JEE Online 09-04-2017]

    A)  120 m/s                       

    B)  90 m/s

    C)  160 m/s                       

    D)  180 m/s

    Correct Answer: C

    Solution :

    [c] \[V=\frac{w}{k}\]
                \[=\frac{200\pi }{5\pi /4}\,=160\]


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