Define resistivity write an expression for the resistivity of a substance
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Explanation:
Resistivity is the measure of a material's ability to oppose the flow of current . Resistivity of a conductor is a property of the material of the conductor. Unit of resistivity is Ohm meter, Ω m . Resistivity of the material of the conductor changes with temperature.
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Answer:
a measure of the resisting power of a specified material to the flow of an electric current.
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