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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
When the power is on, an alternating current passes through the coil. Ari Plachta, Sacramento Bee, 17 Jan. 2025 One of Tesla's most significant contributions was the development of the alternating current (AC) electrical system, which is far more efficient than direct current (DC) for transmitting electricity over long distances. Vibhas Ratanjee, Forbes, 10 Jan. 2025 These devices convert direct-current electricity to grid-compatible alternating current, and allow batteries, solar photovoltaics and wind turbines to connect to the grid. IEEE Spectrum, 24 Dec. 2024 Grid-forming converters for HVDC, which convert high-voltage direct current to alternating current and vice versa, are also commercially available, from companies including Hitachi, Siemens, and GE Vernova. Benjamin Kroposki, IEEE Spectrum, 13 Apr. 2024 See all Example Sentences for alternating current 

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 30 Jan. 2025.

Kids Definition

alternating current

noun
: an electric current that reverses its direction at regular intervals
abbreviation AC

More from Merriam-Webster on alternating current

Last Updated: - Updated example sentences
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