define resistivity...............
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the resistivity of a substance is numerically equal to the resistance of a rod of that substance which is 1 metre long and 1 square metre in cross section
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Electrical Resistivity of a substance is the resistance per its unit length and per its unit cross section area. Its units are : Ohm-meters in SI system.
ρ = Resistance * Area / Length
Resistivity is the property of the substance (not of shape).
ρ = Resistance * Area / Length
Resistivity is the property of the substance (not of shape).
Adityanegi:
a measure of the resisting power of a specified material to the flow of an electric current.
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