Question

Coon mee raper)
Distinguish between the terms electrical
resistance and resistivity of a conductor.​

Answer 1

$\mathfrak{\large{\underline{\underline{Answer:-}}}}$

$\sf{\underline{Electrical Resistance }}$

It is the property of a conductor to resists the flow of electric current through it is called resistance.

→ It is denoted by R .

→ It's SI unit is Ohm.

The resistance of a conductor varies with the temperature, nature of material, length and area of cross section.

$\sf{\underline{Electrical Resistivity }}$

It is defined as the resistance offered by a conductor of unit length and unit area of cross section.

→ It is represented by P (rho).

→It's SI unit is ohm -metre.

The Resistivity of a conductor is independent of its dimensions but depends upon the nature of material.

Relation between the Resistance and Resistivity.

★ $\boxed{\sf{R =p\frac{l}{a} }}$

If the length and area of conductor be 1 units then.

★ $\boxed{\sf{ R = P }}$