Capacitors are used for storing charge. They are two plates in a circuit that are close together but not touching, they are separated by a dielectric which, if it breaks, the dielectric will breakdown and charge will be lost. An example of a capacitor is a thundercloud.

e.g. (


Capacitors have a capacitance which is defined as the charge stored per unit volt.

                 C = Q/V                               C is capacitance measured in farads 

1F = 1 C V-1 (A capacitance of


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