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The unit of charge in CGS EMU is: = = = / = / /. Dimensionally in the CGS-EMU system, charge q is therefore equivalent to M 1/2 L 1/2. Hence, neither charge nor current is an independent physical quantity in the CGS-EMU system.
This system is the most common of the several electromagnetic unit systems based on the centimetre–gram–second system of units (CGS). It is also called the Gaussian unit system, Gaussian-cgs units, or often just cgs units. [a] The term "cgs units" is ambiguous and therefore to be avoided if possible: there are several variants of CGS, which ...
The statcoulomb (statC), franklin (Fr), or electrostatic unit of charge (esu) is the unit of measurement for electrical charge used in the centimetre–gram–second electrostatic units variant (CGS-ESU) and Gaussian systems of units. In terms of the Gaussian base units, it is
In some natural unit systems, such as the system of atomic units, e functions as the unit of electric charge.The use of elementary charge as a unit was promoted by George Johnstone Stoney in 1874 for the first system of natural units, called Stoney units. [7]
The coulomb (symbol: C) is the unit of electric charge in the International System of Units (SI). [1] [2] It is defined to be equal to the electric charge delivered by a 1 ampere current in 1 second. It is used to define the elementary charge e. [2] [1]
The abcoulomb (abC or aC) or electromagnetic unit of charge (emu of charge) is the derived physical unit of electric charge in the cgs-emu system of units. One abcoulomb is equal to ten coulombs . The name "abcoulomb" was introduced by Kennelly in 1903 as a short form of (absolute) electromagnetic cgs unit of charge that was in use since the ...
The unit of charge then connects to 1 dyn⋅cm 2 = 1 statC 2 = 4π HLC 2, where 'HLC' is the HL unit of charge. The HL quantity q HL describing a charge is then √ 4π times larger than the corresponding Gaussian quantity. There are comparable relationships for the other electromagnetic quantities (see below).
The abfarad (abbreviated abF) is an obsolete CGS unit of capacitance, which corresponds to 10 9 farads (1 gigafarad, GF). [18] The statfarad (abbreviated statF) is a rarely used CGS unit equivalent to the capacitance of a capacitor with a charge of 1 statcoulomb across a potential difference of 1 statvolt.