“conductivity(symbol: σ; unit: siemens per metre)”的概念、定义、翻译、参考文献-科学参考

conductivity(symbol: σ; unit: siemens per metre)

Electronics and Electrical Engineering

A property that describes how easily electric current can flow in a material. It is the product of the charge density and the particle mobility μ:
$σ = n e μ$
where the charge density (ne) is the product of the number density of electrons or holes and the charge on each carrier. In a semiconductor both electrons and holes contribute to the overall conductivity. Conductivity is also the ratio of current density J to electric field E in a material:
$σ = \frac{J}{E}$
which is an expression of Ohm’s law. Conductivity is the reciprocal of resistivity. See also conductance.

单词	conductivity(symbol: σ; unit: siemens per metre)
释义	conductivity(symbol: σ; unit: siemens per metre) Electronics and Electrical Engineering A property that describes how easily electric current can flow in a material. It is the product of the charge density and the particle mobility μ: $σ = n e μ$ where the charge density (ne) is the product of the number density of electrons or holes and the charge on each carrier. In a semiconductor both electrons and holes contribute to the overall conductivity. Conductivity is also the ratio of current density J to electric field E in a material: $σ = \frac{J}{E}$ which is an expression of Ohm’s law. Conductivity is the reciprocal of resistivity. See also conductance.
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