Question

what is resistivity derive its formula​

Answer 1

Answer:

Resistivity is the resistance per unit length and cross-sectional area. ... 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

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Answer 2

Answer:

Resistivity or electric resistivity is certainly the inverse of the electrical conductivity. Resistivity is a fundamental property of a material and it demonstrates how strongly the material resists or conducts electric current.

Explanation:

resistivity formula

resistivity =1/conductivity

The equation can be represented as :

ρ = 1/σ

σ = conductivity

ρ = resistivity

Furthermore, another formula for resistivity can be

ρ = RA/L

Here,

p= resistance

R = resistance

A = cross-sectional

L = length