PHYSICS resistance and resistivity

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4 Terms

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ohms law

current through a metallic conductor is directly proportional to the potential difference across it, provided the temperature remains constant.

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non ohmic behaviour

I is not directly proportional to V

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resistivity

numerically equal to the resistance of a sample of the material 1 m long and of cross-sectional area 1 m 2

4
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superconductor

loses all its electrical resistivity to become a perfect conductor when it is below its critical temperature.