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.

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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)

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