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'''Electrical conductivity''' is the measure of a material's ability to accommodate the transport of an electric charge. Its [[SI derived unit]] is the ''[[siemens (unit)|siemens]] per [[metre]]'', ([[ampere|A]]²[[second|s]]³[[metre|m]]⁻³[[kilogram|kg]]⁻¹)  (named after [[Werner von Siemens]]) or, more simply,  Sm⁻¹. It is the ratio of the [[electric current|current]] density to the [[electric field]] strength or, in more practical terms, is equivalent to the electrical conductance measured between opposite faces of a 1-metre cube of the material under test.  

'''Electrical conductivity''' is the measure of a material's ability to allow the transport of an electric charge. Its [[SI]] is the ''[[siemens (unit)|siemens]] per [[metre|meter]]'', ([[ampere|A]]²[[second|s]]³[[metre|m]]⁻³[[kilogram|kg]]⁻¹)  (named after [[Werner von Siemens]]) or, more simply,  Sm⁻¹.  

*As symbol for electrical conductivity we find <math>\kappa</math> ([[kappa]]), but also <math>\sigma</math> ([[sigma]]) or <math>\gamma</math> ([[gamma]]).

 

Electrical conductance is an [[electric charge|electrical phenomenon]] where a material contains movable particles with [[electric charge]] (such as [[electrons]]), which can carry [[electricity]]. When a difference of electrical potential is placed across a conductor, its movable charges flow, and an [[electric current]] appears.

It is the ratio of the [[electric current|current]] density to the [[electric field]] strength. It is equivalent to the electrical conductance measured between opposite faces of a 1-metre cube of the material under test.  

A [[Electrical conductor|Conductor]] such as a [[metal]] has high conductivity, and an [[insulator]] like [[glass]] or a [[vacuum]] has low conductivity. A [[semiconductor]] has a conductivity that varies widely under different conditions.

 

*The symbol for electrical conductivity is '''κ''' ([[kappa]]), and also '''σ''' ([[sigma]]) or '''γ''' ([[gamma]]).

 

Electrical conductance is an [[electric charge|electrical phenomenon]] where a material contains movable particles with [[electric charge]] (such as [[electrons]]), which can carry [[electricity]]. When a difference of electrical potential is placed across a conductor, its electrons flow, and an [[electric current]] appears.

 

A [[Electrical conductor|conductor]] such as a [[metal]] has high conductivity, and an [[Insulator (electricity)|insulator]] like [[glass]] or a [[vacuum]] has low conductivity. A [[semiconductor]] has a conductivity that varies widely under different conditions.

 

Electrical conductivity is the [[reciprocal]] (or [[inverse]]) of [[electrical resistivity]].

Electrical conductivity is the [[reciprocal]] (or [[inverse]]) of [[electrical resistivity]].

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[[Category:Electricity]]

[[Category:Electricity]]

[[Category:Materials science]]

[[Category:Materials science]]