Question

What is the total current in a diode when x=0?

(a) I = Ipn (0) – Inp (0)

(b) I = Ipn (0) + Inp (0)

(c) I = -Ipn (0) – Inp (0)

(d) I = -Ipn (0) + Inp (0)

The question was posed to me during a job interview.

I would like to ask this question from The Current Components in a P-N junction diode in section Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

Correct choice is (b) I = Ipn (0) + Inp (0)

The best I can explain: At junction, the total current is equal to the minority hole current plus the minority electron current.