abampere/inch [abA/in] Unit Converter

Definition of abampere/inch [abA/in] unit

The abampere per inch (abampere/in) is a unit of linear current density in the electromagnetic CGS-EMU system. It describes electric current distributed along a line, equal to one abampere flowing across each inch of transverse width.

History of abampere/inch [abA/in] unit

The abampere originated in the electromagnetic centimetre–gram–second (CGS-EMU) system developed in the nineteenth century, when scientists defined electrical units directly from magnetic-force measurements. In that system, one abampere, also called an electromagnetic ampere, equals ten amperes in the International System. Expressing it per inch combines this CGS-derived current unit with an imperial length, a practical convention appearing in older engineering, magnetics, and wire or sheet-current literature. Modern metrology generally replaces it with amperes per metre, although the historical form remains useful when interpreting legacy specifications and technical documents.

Applications of abampere/inch [abA/in] unit

Abampere per inch may appear in historical descriptions of current sheets, electromagnetic coils, busbars, or magnetized conductors, especially in documents using CGS-EMU conventions. It can express surface current by indicating how much current is associated with each inch of width. For contemporary calculations, engineers usually convert it to amperes per metre: 1 abampere/in equals 393.7008 A/m.

Complete list of abampere/inch [abA/in] unit conversion