While studying electron drift through a metallic conductor, current per unit area called current density is equal to? (Where 'e' is charge on an electron, 'm' is mass of an electron, 'E' is the electric ﬁeld, 'τ' is relaxation time and 'n' is the number of free electrons per unit volume)

While studying electron drift through a metallic conductor, current pe

1.	While studying electron drift through a metallic conductor, current per unit area called current density is equal to? (Where 'e' is charge on an electron, 'm' is mass of an electron, 'E' is the electric ﬁeld, 'τ' is relaxation time and 'n' is the number of free electrons per unit volume)
A.	ne2 / m
B.	ne2τ / m
C.	eτ / m
D.	ne2τ E / m
Answer» E.