The energy required to charge a parallel plate condenser of plate separation `d` and plate area of cross-section A such that the uniform electric field between the plates `E` is
Options:
(a) `1/2 (epsilon_0 E^2)/(Ad)`
(b) `(epsilon_0 E^2)/(Ad)`
(c) `epsilon_0 E^2Ad`
(d) `1/3(epsilon_0 E^2)/(Ad)`