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Discussion :: Electromagnetic Field Thoery

  1. The magnetic field intensity vector of a plane wave is given by (x, y, z, t) = 10 sin (5000t + 0.004x + 30 ), where denotes unit vector in y direction the wave is propagating with a phase velocity.

    2. A.
    5 x 104 m/sec
    B.
    -3 x 108 m/sec
    C.
    -1.25 x 107 m/sec
    D.
    3 x 108 m/sec

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    Answer : Option C

    Explanation :

    (x, y, z, t) = 10 sin (5000t + 0.004x + 30)

    Wave is propagating in - ve direction, hence

    v = - 1.25 x 107 m/sec.

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