Definition:Capacitor

Definition
A capacitor is an electrical component whose purpose is to introduce capacitance into an electric circuit.

It consists of an implementation of two parallel conducting laminae placed a small distance apart:

Plate of Capacitor

 * Capacitance.png

When a potential difference $V$ is applied across the plates, a charge $Q$ appears on those plates whose value is determined by the capacitance $C$:


 * $C = \dfrac Q V$

Also see

 * Definition:Inductor
 * Definition:Resistor