A capacitor is an electrical device which can be used to store a charge by application of a voltage. The simplest type of capacitor consists of two parallel plates with a voltage applied across them. A capacitor is characterized by its ratio of charge stored to applied voltage, called the capacitance and measured in Farads. Unlike a battery, when the voltage is removed, the capacitor discharges.

Battery, Capacitance, Farad, Leyden Jar, Parallel Plate Capacitor