The abampere (aA) is the basic unit of current in the CGS electromagnetic system of units. One abampere is equal to ten amperes in the SI system of units. In physics and metrology, units are standards for measurement of physical quantities that need clear definitions to be useful. ... In electricity, current is the rate of flow of charges, usually through a metal wire or some other electrical conductor. ... CGS is an acronym for centimetre-gram-second. ... In physics, the ampere (symbol: A, often informally abbreviated to amp) is the SI base unit used to measure electrical currents. ... The International System of Units (symbol: SI) (for the French phrase Système International dUnités) is the most widely used system of units. ...

In the electromagnetic CGS system, electrical current is a fundamental quantity defined via Ampere'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. In physics, Ampères law is the magnetic equivalent of Gausss law, discovered by André-Marie Ampère. ... Permeability has several meanings: In electromagnetism, permeability is the degree of magnetisation of a material in response to a magnetic field. ...

The other units in this system are the abcoulomb (charge), abfarad (capacitance), abhenry (inductance), abohm (resistance) and abvolt (potential). The abcoulomb (abC) or electromagnetic unit of charge (emu) is the physical unit for electrical charge used in the cgs electromagnetic system of units. ... Electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interactions. ... Capacitance is a measure of the amount of electric charge stored (or separated) for a given electric potential. ... Inductance is a physical characteristic of any system of conductors (including an inductor), which creates a voltage proportional to the instantaneous rate of change in current flowing through it. ... Electrical resistance is a measure of the degree to which an electrical component opposes the passage of current. ... In physics, a potential is a scalar quantity that can be used to analyze the effects of complicated vectorial forces and similar quantities by means of simple conservation laws. ...