Distinguish between resistance and resistivity.
The following points state the differences between Resistance and Resistivity:
Resistivity | Resistance | |
1) | The resistivity of a material is the resistance of a wire of that material of unit length and unit cross-sectional area. | Resistance is the opposition to the flow of electric current in a substance. |
2) | It is an intrinsic property | It is an extrinsic property |
3) | The resistivity of a conductor is always same and is independent of its length or size. | The resistance of a conductor is dependent on its length or size. |
4) | The unit of resistivity is ohm-metre | The unit of Resistance is ohm |