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what is capacitor?

Capacitor is an electronic component that stores electric charge. The capacitor is made of 2 close conductors (usually plates) that are separated by a dielectric material. The plates accumulate electric charge when connected to power source. One plate accumulates positive charge and the other plate accumulates negative charge.

The capacitance is the amount of electric charge that is stored in the capacitor at voltage of 

1 Volt.

The capacitance is measured in units of Farad (F) (usually in microfarad [?F] ).

Capacitor disconnects current in DC circuits and short circuit in AC circuits