Question

Which of these following is not a characteristic of an ideal diode?

(a) Perfect conductor when forward bias

(b) Zero voltage across it when forward bias

(c) Perfect insulator when reverse bias

(d) Zero current through it when forward bias

I got this question during an internship interview.

The above asked question is from Diode Resistance in section Semiconductor-Diode Characteristics of Electronic Devices & Circuits

Answer 1

The correct option is (d) Zero current through it when forward bias

To explain: The diode acts as an ideal diode when it is a perfect conductor and has zero voltage across it during forward bias, a perfect insulator and zero current through it during reverse bias.