Questions
The electric field on an electromagnetic wave is given by The energy contained in a cylinder of cross-section 10 cm2 and length 50 cm along the x-axis will be
detailed solution
Correct option is C
The average average density is given byuav=12ϵ0E02Total volume of cylinderV=Al Total energy contained in the cylinderU=uav(V)=12∈0E02×Al =12×8.86×10−12×(50)2 ×10×10−4×50×10−2J =5⋅5×10−12JTalk to our academic expert!
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The average value of electric energy density in an electromagnetic wave is (E0 is peak value)
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