A parallel plate capacitor has a uniform electric field E in the space between 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 epsi_0 E^2 Ad`
B. `(E^2 Ad)/epsi_0`
C. `1/2 epsi_0 E^2`
D. `epsi_0 E.Ad`

Answer

A

Explanation

Energy density between the plates of capacitor ` u = 1/2 epsi_0 E^2`
Volume of capacitor `V = Ad`
`:.` Total energy strored in the capacitor `u = u.V = 1/2 epsi_0 E^2 Ad`