: a device that is used to store electrical energy
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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 The thermal camera quickly reveals malfunctioning capacitors that are running hot.—Mark Sparrow, Forbes, 1 Feb. 2025 Kyocera’s semiconductor products include ceramic packages, connectors, resistors, couplers, timing devices, capacitors, SAW devices and organic substrates.—Zinnia Lee, Forbes, 31 Oct. 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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