NEET2011PhysicsCapacitanceActual
Energy stored in between the plates of parallel plate capacitor of area A , separated by distance d is
Options
- A1 2 ₀ E^2 A d
- B1 2 ₀ E^2 A d
- C1 2 ₀ d E^2 A
- D1 2 A d ₀ E^2
Correct answer
A. 1 2 ₀ E^2 A d
Step-by-step solution
Energy stored in capacitor of capacitance C with voltage V is, U= 1 2 C V^2 but C= ₀ A d , V=E d where A is the area of capacitor plate and d is the distance of separation and E is the electric field. U= 1 2 ₀ A d E^2 d^2= 1 2 ₀ E^2 A d