Given an electromagnetic wave, H = Ho ej(wt + Bz) î. Determine its electric field.
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ANSWER
∵
E
×
B
∣∣
V
Given that wave is propagating along positive z-axis and
E
along positive x-axis. Hence
B
along y-axis.
From Maxwel equation
V
×
E
=−
∂t
∂B
i.e.
∂Z
∂E
=−
∂t
∂B
andB
0
=
C
E
0
so,
B
=
c
E
0
j
^
sin(kz)cos(ωt)
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