Question

Distinguish between drift velocity and mobility.

Answer 1

S No.	Drift velocity	Mobility
1.	The drift velocity is the average velocity acquired by the electrons inside the conductor when it is subjected to an electric field.	Mobility of an electron is defined as the magnitude of the drift velocity per unit electric field.
2.	`vec"V"_"d" = vec"a"tau`	`mu = ("e"tau)/"m" "or"  mu = |vec"V"_"d"|/vec"E"`
3.	It's unit is ms-1.	It's unit is m2v-1s-1.