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alternating current
noun
: an electric current that reverses its direction at regularly recurring intervals
—abbreviation AC
Examples of alternating current in a Sentence
Recent Examples on the Web
Electricity generated at power plants has what’s called an alternating current — its direction swaps 60 times per second.
—Evan Simko-Bednarski, New York Daily News, 3 Nov. 2024
This gear converted grid power to direct current and then converted it back to alternating current—conversions that consumed a full 6 percent of the plant’s electricity.
—IEEE Spectrum, 3 Sep. 2024
The shingle-style component—made of both glass solar and steel tiles—absorbs sunlight and converts direct current energy into alternating current energy that can power the home.
—Demetrius Simms, Robb Report, 29 Oct. 2024
The inverter is bidirectional, so that alternating current produced by the e-axle under regenerative braking is turned into direct current to charge the battery.
—Jason Barlow, WIRED, 17 Oct. 2024
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Word History
First Known Use
1833, in the meaning defined above
Time Traveler
The first known use of alternating current was
in 1833
Dictionary Entries Near alternating current
Cite this Entry
“Alternating current.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alternating%20current. Accessed 15 Dec. 2024.
Kids Definition
alternating current
noun
: an electric current that reverses its direction at regular intervals
—abbreviation AC
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