Question

Resistance and resistivity are related by a:

factor that is dependent on the length of the material
factor that is dependent on the area of the material
proportionality constant dependent on the identity of the material
proportionality constant dependent on the source of the material

Answer 1

proportionality constant dependent on the identity of the material

Step-by-step explanation:

Answer 2

At a given temperature

Resistivity depends only on the material and resistance depends on resisitvity, length of the wire and cross-sectional area of the wire

Step-by-step explanation:

At a given temperature the resistance of a specimen with unit length and unit cross sectional area is called resisitivity.

We get

R = ρl/A

where; R = resistance

ρ = resistivity

l = length of the wire

A = cross-sectional area of the wire

So you get, ρ ∝ 1\l

ρ ∝ A

ρ ∝ R