A large conducting plane has a surface charge density `1.0xx10^(-4)c m ^(-2) . Find the electrostatic energy stored in a cubical volume of edge `1.0`cm in front of the plane .

Explanation

`r = 41 xx 10^(-4) c / m^(2) , a = 1cm = 1 xx 10^(-2)m`,
`a^(3) = 10^-6) m`
The energy stored in the plane `= 564.97 ` The necessary electrostaticnic energy stored in a cubical volume of edge 1 cm in front of the plane . `= E a^(3)`
`= 564 xx 10^(-6) J `
`= 5.65 xx 10^(-4) J.