Question

expression for electrical conductivity of a metal​

Answer 1

The conductive property of a substance is characterized by its conductivity, σ, defined according to Ohm's Law by the expression j = σE. Here, j is the electric current density and E is the strength of the electric field. The magnitude ρ = 1/σ is called resistivity. In metals, free electrons are the charge carriers.

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Answer 2

Answer:

electrical conductivity.

Explanation:

wkt R=pl/A(p=resistivity,l=length,A=area of crosssection)

conductivity=1/resistivity

conductance=1/resistance

p=RA/l

conductivity=A/lR=KA/l(K=conductance)