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The magnetic field in a plane electromag...

The magnetic field in a plane electromagnetic wave travelling along the x -axis given by `vec B=[2times10^(-4)]sin(omega t-kx)vec j` where B is in tesla,t in sec and x in m .The peak value of magnetic force acting on a particle of charge `5 mu C` moving with a velocity of `4times10^(5)ms^(-1)` along the y-axis is 1) `2times10^(-4)N` 2) `6times10^(-4)N` 3) `4times10^(4)N` 4) Zero

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