Write relation of Drift Velocity with mobility.

Define drift velocity.

Define drift velocity and derive an expression for it. Establish a relation between drift velocity and electric current.

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

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

Define mobility -- Write its relation with electric current.

Define 'Drift Velocity' and 'Relaxation time'.