Potential energy of a charged plane capacitor
$$W = \frac{\varepsilon\cdot \varepsilon0\cdot E^{2}\cdot S\cdot d}{2}$$
W - potential energy
ε - dielectric constant (permittivity)
ε0 - permittivity constant
E - electric field
S - area
d - the distance between the plates
ε - dielectric constant (permittivity)
ε0 - permittivity constant
E - electric field
S - area
d - the distance between the plates
Find
It is known that:
= 