A capacitor is an instrument that stores electrical energy in an electrical field. It is a passive, two-terminal, electronic component.
The capacitor effect is known as capacitance. Although some power occurs in proximity in a circuit between any two electrical conductors, a capacitor is a device designed to add capacitance to a circuit. The capacitor was initially known as a condenser or condensator. This name and its cognates are now commonly used in many languages although seldom in English, with one significant exception being condenser microphones, also named capacitor microphones.
The capacitance is the amount of electric charge stored at a voltage of 1 Volt in the capacitor.
Farad (F) is the unit of the capacitance.
The capacitor disconnects current in circuits of direct current ( DC), and short circuit in circuits of alternating current ( AC).
The capacitance (C) of the capacitor is equal to the electric charge (Q) divided by the voltage (V)