A capacitor is an electric device or circuit element that stores charge and energy. The capacitance of the capacitor is given by

C =

The electric potential energy stored in a capacitor is given by

PEcap = 1/2 QV = 1/2 CV2 = 1/2 Q2/C

Capacitors in series or parallel may be replaced by a single equivalent capacitor whose value can be calculated by

= + ... (series capacitors)

Ceq = C1 + C2 + C3 + ... (parallel capacitors)

Choice of Numerical Examples


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(c) Doug Davis, 2002; all rights reserved