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ampere-turn

noun

am·​pere-turn ˈam-ˌpir-ˈtərn How to pronounce ampere-turn (audio)
also -ˌper-
: the meter-kilogram-second unit of magnetomotive force equal to the magnetomotive force around a path that links with one turn of wire carrying an electric current of one ampere

Examples of ampere-turn in a Sentence

Recent Examples on the Web
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The system, which features a complete set of HTS magnets built in a tokamak configuration, successfully managed seven million ampere-turns of electrical current through its central column. Aman Tripathi, Interesting Engineering, 22 Nov. 2025

Word History

First Known Use

1884, in the meaning defined above

Time Traveler
The first known use of ampere-turn was in 1884

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Cite this Entry

“Ampere-turn.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ampere-turn. Accessed 4 Dec. 2025.

Last Updated: - Updated example sentences
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