using the mathematical expression for the conductivity of a material, explain how it varies with temperature for 1. semiconductors, 2. good conductors.

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Please find below the solution to the asked query:

Variation of resistivity with temperature:ρ=ρ01+α tVariation of conductivity with temperature:σ=1ρ   =1ρ01+α twhereα=Temperature coefficient of resistivity***Case I: Semi-conductorsFor semiconductors, the value of α is negative.Hence, it can be concluded that the conductivity of semi-conductorsincreases with increase in temperature.***Case II: Good conductorsFor Good conductors, the value of α is positive.Hence, it can be concluded that the conductivity of good conductorsdecreases with increase in temperature.

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