Resistance And Resistivity

To solve the problem, we need to understand the SI unit of resistivity.

1. Formula for Resistivity:
Resistivity ( ) is defined as the resistance of a material per unit length and per unit cross-sectional area. The formula for resistivity is:

where is the resistance, is the cross-sectional area, and is the length.

2. SI Unit of Resistivity:
The unit of resistance is ohms ( ), the unit of length is meters (m), and the unit of area is square meters (m²). Hence, the SI unit of resistivity is:

Final Answer:
The SI unit of resistivity is