Question

If the temperature of a good conductor increases , how does the relaxation time of electrons in the conductor change?

Answer 1

HI friend

when the temperature increases the number of collisions of the electrons in the conductor increases.This reduces the relaxation time of the electrons. Relaxation time is directly proportional to the drift velocity as:
 
V = -(eE/m)τ where τ is the relaxation time and V is the drift velocity. so as the relaxation decreases, the drift velocity also decreases