A parallel plate capacitor has a uniform electric field E in the space between the the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is

Options

A. `1/2 epsilon_0E^2`
B. `E^2 Ad//epsilon_0`
C. `1/2 epsilon_0E^2Ad`
D. `epsilon_0EAd`

Answer

C

Explanation

`U=1/2 CV^2 =1/2 ((Aepsilon_0)/d) (Ed)^2`
`=1/2 epsilon_0 E^2 Ad.`