(Latin: prefix; indicating electromagnetic units of the centimeter-gram-second system)
One abampere equals 10 amperes in the absolute meter-kilogram-second-ampere system.
In the electromagnetic cgs system, electrical current is a fundamental quantity defined via Ampère's law and takes the permeability as a dimensionless quantity (relative permeability) whose value in a vacuum is unity and, as a consequence, the square of the speed of light appears explicitly in some of the equations interrelating quantities in this system.
The abfarad was named after the English physicist Michael Faraday who contributed to the study of electromagnetism, the physical interaction that occurs between electrically charged particles; and electrochemistry, the branch of physical chemistry that studies the relationship between electricity, as a measurable and quantitative phenomenon, and identifiable chemical changes.
Michael Faraday (1791-1867) was an English experimental scientist who was especially noted for his discoveries in electricity, including electromagnetic induction, the battery, the electric arc, and the dynamo or an electrical generator that produces direct current.
The term, abhenry, was named for Joseph Henry (1797-1878), a U.S. scientist who discovered the electromagnetic phenomenon of self-inductance, and who also discovered mutual inductance, independently of Michael Faraday. His work on the electromagnetic relay was the basis of the electrical telegraph.
The siemens is the conductance at which a potential of one volt forces a current of one ampere and named for Karl Wilhem Siemens.
Karl Wilhem Siemens (1823-1883) was a German electrical engineer and active in Great Britain as Sir Charles William Siemens. With his brother Ernst, he established many early electrical-engineering projects and manufacturing facilities.