![]() Capacitors are widely used as parts of electrical circuits in many common electrical devices. Materials commonly used as dielectrics include glass, ceramic, plastic film, paper, mica, air, and oxide layers. ![]() The nonconducting dielectric acts to increase the capacitor's charge capacity. A conductor may be a foil, thin film, sintered bead of metal, or an electrolyte. Most capacitors contain at least two electrical conductors often in the form of metallic plates or surfaces separated by a dielectric medium. The physical form and construction of practical capacitors vary widely and many types of capacitor are in common use. The capacitor was originally known as the condenser, a term still encountered in a few compound names, such as the condenser microphone. While some capacitance exists between any two electrical conductors in proximity in a circuit, a capacitor is a component designed to add capacitance to a circuit. ![]() The effect of a capacitor is known as capacitance. It is a passive electronic component with two terminals. For the term used when referring to touchscreens, see Capacitive sensing.Įwald Georg von Kleist, Pieter van Musschenbroek (1745–1746, independently)Ī capacitor is a device that stores electrical energy in an electric field by virtue of accumulating electric charges on two close surfaces insulated from each other. ![]()
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