a device for accumulating and holding a charge of electricity, consisting of two equally charged conducting surfaces having opposite signs and separated by a dielectric.
Historical Examples

The Small World of M-75 Ed M. Clinton, Jr.

a device for accumulating electric charge, usually consisting of two conducting surfaces separated by a dielectric Former name condenser

An electrical device consisting of two conducting plates separated by an electrical insulator (the dielectric), designed to hold an electric charge. Charge builds up when a voltage is applied across the plates, creating an electric field between them. Current can flow through a capacitor only as the voltage across it is changing, not when it is constant. Capacitors are used in power supplies, amplifiers, signal processors, oscillators, and logic gates. Compare induction coil, resistor.

capacitor [(kuh-pas-i-tuhr)]


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