abampere [abA] Unit Converter

Definition of abampere [abA] unit

The abampere is the electromagnetic CGS unit of electric current. It equals ten amperes in the International System of Units (SI), and is defined as one abcoulomb of charge passing a point per second.

History of abampere [abA] unit

The abampere emerged from the electromagnetic centimetre-gram-second (EMU-CGS) system developed in the nineteenth century, when scientists sought coherent electrical units based on centimetres, grams, and seconds. In that system, current was defined through magnetic force, rather than through the modern SI ampere’s fixed-charge definition. The unit was named by analogy with the abvolt, abcoulomb, and other “absolute” electromagnetic units. Because one abampere equals ten amperes, it was practical in some theoretical and laboratory contexts, but the SI system gradually replaced CGS units for general scientific and engineering work.

Applications of abampere [abA] unit

Today, the abampere is mainly encountered in historical discussions, electromagnetic theory, older technical literature, and conversions involving CGS units. It may appear in physics education when comparing CGS and SI quantities, or in specialized research involving legacy equations. For practical electrical measurements, engineers use the ampere, while the abampere remains a reference unit and conversion value.

Complete list of abampere [abA] unit conversion