Question

what is electrical resistivity of a material? State its SI unit and define it .​

Answer 1

Answer:

The electrical resistivity is defined as the electrical resistance of a conductor of unit length and unit area of cross section through which the current passes.

Therefore,

Resistance = Resistivity*Length/Area

and, so,

Unit of Resistivity will clearly be

ohm - metre.

Answer 2

Answer:

The resistivity of a conductor is defined as the resistance of the conductor of length and unit area of cross-section.

Explanation:

• Electrical resistivity is a measure of the resistance of a specific material of a given size, to the electrical current conduction that flows through it. It is also referred to as the specific electrical resistance or volume resistivity
• It is denoted by ρ (rho).  
• S.I.unit of resistivity is ohm-meter (m) or  ​Ωm