Deduce an expression for the electrostatic energy stored in a capacitance 'C' and having charge Q
How will the energy stored

Explanation

If the space between the plates of capacitor filled with a dielectric material of dielectric constant . K , the capacitance of capacitor changes to C , where C. = KC
`therefore` Energy stored `U. = (Q^(2))/(2C.) = (Q^(2))/(2KC) = (U)/(K)`