Questions
The electric field of a plane electromagnetic wave varies with time of amplitude propagating along z-axis. The average energy density of the magnetic field is (in J m-(c)
a
13.29×10-12
b
8.86×10-12
c
17.72×10-12
d
4.43×10-12
detailed solution
Correct option is B
In an electromagnetic wave energy is equally distributed in both electric and magnetic field. Total energy density is 12ε0E02 and energy associated with electric or magnetic field is 14ε0E02=144× 8.86×10-12Talk to our academic expert!
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In an electromagnetic wave, the average energy density associated with magnetic field is
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