Derive an expression for drift velocity of electrons in a conductor. Hence deduce ohm's law.

Obtain an expression for drift velocity of an electron in a conductor.

Derive an expression to find drift velocity of electrons.

Derive an expression for drift velocity of free electrons in a conductor in terms of relaxation time.

(i) Derive an expression for drift velocity of free electrons. (ii) How many drift velocity of electrons in a metallic conductor vary with increase in temperature ? Explain.