2022 Semiconductor Electronics: Materials, Devices and Simple Circuitsp-n Junction Diode – Forward and Reverse Bias Hard Question 21 of 106 in Semiconductor Electronics: Materials, Devices and Simple Circuits

In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in :



In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in :
A Both circuits (a) and (c)
B Circuit (a) only
C Circuit (b) only
D Circuit (c) only

The answer is A.

Solution

In circuits (a) and (c), both junctions are in the same biasing condition, so they offer equal resistances.
Since they are in series (same current), equal potential drops across the two junctions.
In (b), one junction is forward biased and the other reverse biased, so the drops are unequal.
So the drops are equal in both circuits (a) and (c).

Concept potential drop across p-n junctions

Semiconductor Electronics: Materials, Devices and Simple Circuits in past papers

106 questions from this chapter have appeared across 24 exam years.