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

Options

A. Numbr of charge carriers can change with temperature T
B. time interval between two successie collisions can depend of T
C. length of material can be a function of T
D. mass of carriers is a function of T.

Answer

A, B

Explanation

The resistivity of a metallic conductor is given by
`e=(m)/(m e^(2)tau)`
When n is number of charge carriers per unit volume which can change with temperature T and `tau` is time interval between two successive collisions which decreases with the increase of temperature.