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Temperature dependence of resistivity p(...

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

A

number of charge carriers can change with temperature T.

B

time interval between two successive collisions can depend on T.

C

length of material can be a function of T.

D

mass of carriers is a function of T.

Text Solution

Verified by Experts

(A, B)
Resistivity of metal ,
`rho = (m)/("ne"^(2)tau )`
where n is number density of charge carrier per unit volume. With increase in temperature `tau` time interval between two successive collision decrease. Resistivity `rho prop (1)/(tau)` . Hence `rho` depend on temperature.
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