Question

write the expression for energy density of electric field in free space​

Answer 1

The energy stored between the plates of capacitor is equal to the stored amount of energy per unit volume in electric field multiple by volume between of plates . The unit of energy density of electric field is J/m³. In mathematically term, Where, E = energy per unit volume in electric field.

Answer 2

Explanation:

U = ½ε0E2(A*d). (A*d) is the volume between the plates of the capacitor. Inside this volume the electric field is approximately constant and outside of this volume the electric field is approximately zero. We interpret uE = ½ε0E2 as the energy density, i.e. the energy per unit volume, in the electric field.