Question

Briefly briefly explain how the drift velocity of electrons in a metallic conductor varies with applied

Answer 1

When temperature of the conductor is increased; amplitudes of oscillations of positive ions increase, which in turn makes an electron to face more and more collisions with the positive ions of the conductor, resulting decrease in its drift velocity.Hence an increase in temperature implies decrease in the drift velocity

The drift velocity is also slightly temperature-dependent: an increase in temperature causes atoms to vibrate more, which increases the number of collisions electrons have on their way through the wire and decreases the drift velocity.