Question

HOW DOES THE DRIFT VELOCITY OF ELECTRONS IN A METELLIC CONDUCTOR VARY WITH THE INCREASE IN TEMPERATURE?

Answer 1

Increasing the temperature increases the collisions of electrons in the conductor, this decreases the relaxation time. drift velocity and relaxation time are related as,

V_d = - (eE/m)Ï„

where Ï„ is the relaxation time. thus when the Ï„ decreases, drift velocity also decreases.