Question

the relation between current density j and drift velocity vd is:--a) j=ne vd. b) j=ne/vd. c)j=vde/n. d)ne vd2'

Answer 1

Option A is the right answer.

The relation between the current density and the drift velocity is actually the drift speed which is stated as under: vd = j/ne (where n of ne = number of electrons per unit and e = 1.6 x 10^-19 unit). Therefore, appropriate relation is j = vd x ne.