The magnetic field in a plane electromagnetic wave is given by By=4×10−7sin1.5×103x+1.5×1011tT. Write an expression for the electric field.
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a
Ez=120sin1.5×103x+1.5×1011t
b
Ez=60sin1.5×103x+1.5×1011t
c
Ey=120sin1.5×103x+1.5×1011t
d
Ey=60sin1.5×103x+1.5×1011t
answer is A.
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Detailed Solution
E0=CB0=3×108×4×10−7=120 V/m Both electric and magnetic fields are in same phase. Wave is travelling in -x direction , Magnetic field is in y direction. So, electric field has to be along z direction.