Question

explain resitivity with suitable expression ?​

Answer 1

The resistance offered by a conductor having unit length and unit area of cross-section is called resistivity. It is the reciprocal of conductance.

sigma = 1/ rho, where

sigma = resistivity

rho = conductivity

Answer 2

Answer:

Resistivity

Resistivity is the resistance per unit length and cross-sectional area. It is the property of the material that opposes the flow of charge or the flow of electric current. The unit of resistivity is ohm meter.We know that R = ρ L / A. Thus we can derive the expression for resistivity from this formula. ρ = R A / L, where R is the resistance in ohms, A is the area of cross-section in square meters and L is the length in meters. When the values of L, the length, and A, the area is equal to one, we can say that the resistivity is equal to the resistance.