Tuesday, January 1, 2013

Variation of Electrical Resistivity with Temperature

The resistivity of a material is dependent on the temperature. Different materials do not exhibit the same dependence on temperatures.

ρT = ρ0 [1 + α (T–T0)]

where ρT is the resistivity at a temperature T and ρ0 is the same at a reference temperature T0. α is called the temperature co-efficient of resistivity, and from the dimension of α is (Temperature)–1.

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