Energy and Charge Storage by Capacitor

The amount of charge stored by a capacitor is given by Q = CV, and when C is given in μF and V in volts, charge Q is then in microcoulombs (μC).

How much charge is stored by a 0.1 μF capacitor charged to 50 V?

Using Q = CV with C in μF, V in volts then Q = 0.1 × 50 = 5 μC The amount of energy, in units of joules, stored by a charged capacitor is most conveniently given byW = ½CV2. Other equivalent expressions are:Energy and charge storage