What is the energy stored per unit volume in vacuum, where the intensity of electric field is `10^(3)V//m` ? `(epsi_(0)=8.85xx10^(-12)c^(2)//N-m^(2))`

Options

A. `8.85xx10^(-6)J//m^(3)`
B. `4.425xx10^(-6)J//m^(2)`
C. `4.425xx10^(-8)J//m^(3)`
D. `8.85xx10^(-5)J//m^(3)`

Answer

B

Explanation

Energy stored per unit volume `=(1)/(2)epsi_(0)KE^(2)`
`=(1)/(2)=8.85xx10^(-12)xx10^(6)=4.425xx10^(-6)(J)/(m^(3))`