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The electric field of a plane electromag...

The electric field of a plane electromagnetic wave varies with time of amplitude `2Vm^-1` propagating along z-axis. The average energy density of the magentic field is (in `Jm^-3`)

A

`13.29 xx 10^(-12)`

B

`8.86 xx 10^(-12)`

C

`17.72 xx 10^(-12)`

D

`4.43 xx 10^(-12)`

Text Solution

Verified by Experts

The correct Answer is:
C
Average energy density = `(1)/(2)(B^(2))/(mu_(0))= (1)/(2)(E_(0)^(2))/(mu_(0)c^(2))= (1)/(2) xx 8.85 xx 10^(-12) xx (2)^(2) = 17.72 xx 10^(-12)`
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