The energy of a charged capacitor is given by the expression `(q =` charge on the conductor and `C =` its capacity

The mean electric energy density between the plates of a charged capacitor is (here q = charge on the capacitor and A = area o fthe capacitor plate)

The energy stored in a capacitor is given by (V = Voltage, C = Capacitance, q = Charge)

Find the expression of potential energy of a charge conductor.

two capacitors of capacity 200 pF and 600 pF are connected in parallel and then charged to a potential of 120 V. Determine (a) the charge on each capacitor, (b) the total charge on each cpacitor and (c) the effective capacity of the combination.