Question

If \[n\] is the number of free electrons per unit volume and \[A\] is the conductor’s cross-sectional area, which expression gives the current from electron drift?

Options

• \[I=neAv_d\]

• \[I=\frac{neA}{v_d}\]

• \[I=\frac{ne^2\tau}{m}E\]

• \[I=\frac{A}{j}\]

Answer 1

The current obtained from electron drift is \[I=neAv_d\]. It links microscopic electron motion with macroscopic current in a wire.