Question

The resistance of a reverse biased $pn$ junction diode is about:- -

• A. Infinity
• B. ${10}^2$ ohm
• C. ${10}^3$ ohm
• D. ${10}^1$ ohm

Answer 1

The correct option is A Infinity

Theoretically, the resistance of a $\text{p - n}$ junction in reverse bias is indeed infinity. But, in the experiment, we can find a very tiny amount of current (almost negligible) through a $\text{p - n}$ junction in reverse bias because of the movement of minority charge carriers.

So, option (A) is correct.