Temperature dependence of resistivity p(T) of semiconductors, insulators and metals is significantly based on the following factors :

The temperature dependence of resistivity ρ(T) is influenced by:
(a) Number of charge carriers can change with temperature
T → In semiconductors and insulators, the number of free charge carriers increases with temperature, significantly affecting resistivity.
(b) Time interval between two successive collisions can depend on
T → In metals, increased temperature leads to more frequent collisions, increasing resistivity.
Thus, the correct answers are (a) and (b).
Class 12th Science Physics NCERT MCQ Questions
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