: a device that is used to store electrical energy
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The latest injection of funds will be directed towards manufacturing components in-house, including capacitors for energy storage and magnetic coils for its prototype fusion reactor.—New Atlas, 29 Jan. 2025 The design is split into two separate circuit boards, eliminating electromagnetic interference from the bass crossover components affecting higher frequency signals, and incorporating specialized inductors and capacitors selected for their first-rate audio performance.—Mark Sparrow, Forbes, 1 Nov. 2024 Those minerals have applications in everything from capacitors in electronic devices to the brakes on jet aircraft.—Ben Berkowitz, Axios, 20 Feb. 2025 Behind them is a sea of refrigerator-sized capacitors.—Jaron Lanier, WIRED, 10 Dec. 2024 See All Example Sentences for capacitor
: a device giving capacitance and usually consisting of conducting plates or foils separated by thin layers of dielectric (as air or mica) with the plates on opposite sides of the dielectric layers oppositely charged by a source of voltage and the electrical energy of the charged system stored in the polarized dielectric
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