What is resistivity of a conductor? What is its unit?
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The resistivity of a conductor is defined as the resistance offered by the material per unit length for unit cross-section. Resistivity is a property of the material and depends on temperature and pressure. The resistivity of conductors is low when compared to the resistivity of the insulators.
Unit of resistivity is ohm meter.
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ohm
Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.
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