Question

The tendency of charge carriers to move from a region of heavily concentrated charges to region of less concentrated charge is known as.

(a) Depletion current

(b) Drain current

(c) Diffusion current

(d) Saturation current

The question was posed to me during an interview.

My question is taken from Quantitative Theory of the P-N Diode Currents topic in chapter Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

Correct answer is (c) Diffusion current

For explanation I would say: In a semiconductor the charge will always have a tendency to move from higher concentrated area to less concentrated area to maintain equilibrium this movement of charges will result in diffusion current.