NEET2012PhysicsCapacitanceActual
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
- A1 2 ₀ E^2
- BE^2 A d / ₀
- C1 2 ₀ E^2 A d
- D₀ E A d
Correct answer
C. 1 2 ₀ E^2 A d
Step-by-step solution
Energy density for a parallel plate capacitor = 1 2 ₀ E^2 and volume =A d Total energy = energy density volume aligned & = ( 1 2 ₀ E^2 ) (A d) & = 1 2 ₀ E^2 A d aligned