Question

what is resistivity​

Answer 1

hey mate here is your answer....

Resistivity is defined as the resistance applied on a unit cross sectional area per unit length..

it is denoted by rho.

rho=R*A/L

hope it helps you...

Answer 2

Resistance is the property of a material to oppose the flow of electrons through it.

Resistivity is the specific Resistance of any material.

Resistivity doesn't depend on any external factors. It is same for all the materials made of the same element.

Resistivity is very high for insulators (10¹² — 10¹⁴ and above) .

It is moderate for alloys and very less for good conductors.

How do we derive Resistivity :-

Resistance is directly proportional to Length and area of cross section of a conductor.

$R \propto \dfrac{l}{a}\\ \\ \\R = \rho \dfrac{l} {a}$

$\rule{200}{2}$

$\rho$ is the Resistivity of the metal or the material of which the conductor is made.

The SI unit of Resistivity is

$\Omega\:metre$

$\rule{200}{2}$

The opposite of Resistivity is called as Electrical Conductivity.

The SI unit of Conductivity is equivalent to Siemens per metre.

It is property of a metal to allow the charge to flow through it.