Distinguish between resistance and resistivity.
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- Resistance is the property of the conductor, while resistivity is the property of the material of the conductor.
- Resistance of a conductor is the opposition to the flow of electric current through it. resistivity of a substance is the opposition to the flow of electric current by a rod of that substance which is $1\ m$ long and $1\ m^2$ in cross section.
- Resistivity of a substances depends on the nature of the substance and temperature.
- Resistivity of a substance on the nature of the substance and its temper. it does not depend the length or thickness of the conductor.
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