Define drift velocity.

A potential difference V is applied across a conductor at temperature T (kelvin). Then the drift velocity of electrons is directly propoertional to :

The value of drift velocity of electrons in a metal is about

The current density in a metallic conductor varies drift velocity (V_d) as

Write the relation between current and Drift velocity. Name the symbols used.

State Ohm's law. Derive or explain it, using drift velocity concept.