Exam Question
Draw and explain the shape of the characteristic curves of a p-n junction diode in forward and reverse bias mode. (16)
Class 4 (4th Engineer)
MET
📅 Dec 2024
Reference Answer
### 1. Introduction to the P-N Junction Diode
A P-N junction diode is a fundamental semiconductor device formed by joining a P-type and an N-type semiconductor material. Its primary characteristic is that it allows electric current to flow easily in one direction (forward bias) while offering very high resistance to current flow in the opposite direction (reverse bias). The Voltage-Current (V-I) characteristic curve is a graphical representation of this behavior, plotting the current through the diode against the voltage across it.
### 2. Forward Bias Characteristics
**a) Principle of Operation:**
A P-N junction diode is a fundamental semiconductor device formed by joining a P-type and an N-type semiconductor material. Its primary characteristic is that it allows electric current to flow easily in one direction (forward bias) while offering very high resistance to current flow in the opposite direction (reverse bias). The Voltage-Current (V-I) characteristic curve is a graphical representation of this behavior, plotting the current through the diode against the voltage across it.
### 2. Forward Bias Characteristics
**a) Principle of Operation:**
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