Abcoulomb

Abcoulomb

The abcoulomb (abC or aC) or electromagnetic unit of charge (emu of charge) is the basic physical unit of electric charge in the centimetre gram second system of units. One abcoulomb is equal to ten coulombs.

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. As a consequence, the square of the speed of light appears explicitly in some of the equations interrelating quantities in this system.

The definition of the abcoulomb follows from that of the abampere: given two parallel currents of one abampere separated by one centimetre, the force per distance of wire is 2 dyn/cm. The abcoulomb is the charge flowing in 1 second given a current of 1 abampere.


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  • abcoulomb — [ab ko͞o′läm, ab ko͞o′lōm] n. the basic unit of electric charge in the CGS system, equal to ten coulombs: abbrev. aC …   English World dictionary

  • abcoulomb — /ab kooh lom, lohm/, n. Elect. the centimeter gram second unit of quantity of electricity, equivalent to 10 coulombs. [AB(AMPERE) + COULOMB] * * * …   Universalium

  • abcoulomb — noun a unit of electromagnetic charge equal to ten coulombs …   Wiktionary

  • abcoulomb — A unit of electrical charge equal to 10 coulombs. The charge that passes over a given surface in 1 sec if a current of 1 abampere is flowing across the surface. [ab + coulomb] …   Medical dictionary

  • abcoulomb — ab·cou·lomb …   English syllables

  • abcoulomb — noun a unit of electrical charge equal to 10 coulombs • Hypernyms: ↑charge unit, ↑quantity unit • Part Meronyms: ↑coulomb, ↑C, ↑ampere second * * * (ˈ)abˈküˌläm, lōm noun ( …   Useful english dictionary

  • aC — • abcoulomb; • arabinosyl cytosine …   Dictionary of medical acronyms & abbreviations

  • Centimetre–gram–second system of units — CGS redirects here. For other uses, see CGS (disambiguation). The centimetre–gram–second system (abbreviated CGS or cgs) is a metric system of physical units based on centimetre as the unit of length, gram as a unit of mass, and second as a unit… …   Wikipedia

  • ab- —    a prefix indicating that an electrical unit is part of the CGS absolute electromagnetic system. These units are also indicated by the notation emu (as in volt emu ). Although these units are defined naturally as part of the CGS system, all of… …   Dictionary of units of measurement

  • Conversion of units — is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors. Contents 1 Techniques 1.1 Process 1.2 Multiplication factors …   Wikipedia

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