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Q.

The electric field of an electromagnetic wave in a medium is given by Ex= 0,  , Ez = 0,  and  Ey=2.5Vm-1  cos2π x106rads-1t-πx10-2m-1x, The wave is

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a

Moving along x-direction with frequency 106 Hz and wavelength 100 m

b

Moving along x-direction with frequency 106 Hz and wavelength 200 m

c

Moving along -x-direction with frequency 106 Hz and wavelength 200 m

d

Moving along y-direction with frequency 106Hz and wavelength 200 m

answer is B.

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Detailed Solution

if the equation is in the form ωt-kx it is travelling along +ve x direction .
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