Question

What is the direction of the electron diffusion current density relative to the electron flux?

(a) Same direction

(b) Opposite to each other

(c) Perpendicular to each other

(d) At 270 degrees to each other

This question was posed to me in a job interview.

I'd like to ask this question from Diffusion topic in division Conduction in Semiconductors of Electronic Devices & Circuits

Answer 1

Correct option is (b) Opposite to each other

The explanation: From the graph between electron concentration and the distance, we can see that the direction of the electron diffusion current density is opposite to the electron flux.