(b)  Total work done
in charging the capacitor may be
viewed as stored in the energy of
electric field between the plates Rationalised 2023-24
Electrostatic Potential
and Capacitance
75
 EXAMPLE 2 10
Note that Ad is the volume of the region between the plates (where
electric field alone exists) If we define energy density as energy stored
per unit volume of space, Eq (2