1.

If the electric field intensity associated with a uniform plane electromagnetic wave travelling in a perfect dielectric medium is given by E(, ) = 10 cos (2 x 10 - 0.1 ) volt/metre, then the velocity of the travelling wave is

Answer» E(z, t) = 10 cos (2p x 107t - 0.1 pz) f = 107 Hz, β = 0.1p


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