The energy required to charge a parallel plate condenser of plate separtion `d` and plate area of cross-section `A` such that the unifom field between the plates is `E` is

Options

A. `epsi_(0) E^(2)` Ad
B. `(1)/(2) epsi_(0) E^(2)` Ad
C. `(1)/(2) epsi_(0) E^(2)` /Ad
D. `epsi_(0) E^(2)` /Ad

Answer

B

Explanation

`U = (1)/(2) C V^(2)` and V = Ed