Primary
Henry (H) ○◂｜Definition｜1st｜20260122103308-00-⌔
Henry (unit)
The henry (symbol: H) is the unit of electrical inductance in the International System of Units (SI), defined as 1 kg ⋅ m ⋅ s ⋅ A.12 If a current of 1 ampere flowing through a coil produces flux linkage of 1 weber, that coil has a self-inductance of 1 henry. The unit is named after Joseph Henry (1797–1878), the American scientist who discovered electromagnetic induction independently of and at about the same time as Michael Faraday (1791–1867) in England.3
Printed 2026-06-28.
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Link to original Footnotes
Rowlett, Russ. “How Many? A Dictionary of Units of Measurement”. University of North Carolina at Chapel Hill. Archived from the original on 2016-08-29. Retrieved 2011-08-29. ↩
The International System of Units (PDF), V4.01 (9th ed.), International Bureau of Weights and Measures, Jun 2026, p. 138, ISBN 978-92-822-2272-0 ↩
Herbert S. Bailey Jr. “A Princeton Companion”. Archived from the original on 2011-08-12. Retrieved 2011-08-29. ↩
Secondary
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