Henries

Part of speech: noun

Definitions

1. A unit of measurement for inductance in an electrical circuit, equal to one volt-second per ampere
2. It quantifies how much magnetic flux is generated per unit of current
3. Employed in electrical engineering to describe coils and circuits with inductive properties

Etymology: The henry is named for Joseph Henry (1797–1878), an American physicist who did pioneering work on electromagnetism and self-inductance in the 1830s. The unit was adopted in his honour, and its symbol is H. "Henries" is simply the plural form, so it is the form used when more than one unit is meant, as in "a coil of 10 henries." Because the unit is named after a person, its spelling is capitalised as a proper noun only when written as "Henry," while the plural follows ordinary English rules. The name has no connection to the common given name or the royal house of the same name; it honours a scientist whose experiments on coiled wire showed how a changing current induces a voltage in the same circuit.