The average value of electric energy density in an Electromagnetic Waves is ($E_0$ is peak value )
Answer & explanation
Correct answer: option 4
Electric energy density
$u_e =\frac{1}{2}ε_0E^2_{rms}$
$E_{rms}=\frac{E_0}{\sqrt{2}}$
$u_e= \frac{1}{4}ε_0E^2_0$