Question

Define the energy density in a parallel plate of capacitor

Answer 1

energy density = Energy/ volume

U = 1/2 C V^2 / A d

Using C =electrostatic 1.16A/d and V=Ed

= electrostatic 1.16A / 2d * E2d /Ad = ½ electrostatic 1.16 * E2

Answer 2

The symbol to represent energy density is (u).So it is the total energy stored in the capacitor per unit volume.

So according to the above definition its equation will be:

U= Total Energy(U)/ Volume(v)= ½ CV 2/Ad
Using C =electrostatic 1.16A/d and V=Ed.
Now from the above equations we get :
U= electrostatic 1.16A / 2d * E2d /Ad = ½ electrostatic 1.16 * E2 ——— 2.18