8
TEMPERATURE DEPENDENCE OF RESISTIVITY
The resistivity of a material is found to be dependent on the temperature Different materials do not exhibit the same dependence on temperatures Over a limited range of temperatures, that is not too large, the resistivity
of a metallic conductor is approximately given by,
rT = r0 [1 + a (T–T0)]
(3 26)
where rT is the resistivity at a temperature T and r0 is the same at a
reference temperature T0