Exam Question
Draw and explain the shape of the characteristic curves of a p – n junction diode in forward and reverse bias modes. (16)
Class 4 (4th Engineer)
MET
📅 Dec 2025
Reference Answer
### V-I Characteristic Curve of a P-N Junction Diode
The Voltage-Current (V-I) characteristic curve of a P-N junction diode is a graphical representation of the relationship between the voltage applied across the diode and the current flowing through it. This curve is non-linear and demonstrates the diode's fundamental property of allowing current to flow easily in one direction (forward bias) while restricting its flow in the opposite direction (reverse bias). The curve is typically plotted with voltage (V) on the x-axis and current (I) on the y-axis.
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### 1. Forward Bias Mode
The Voltage-Current (V-I) characteristic curve of a P-N junction diode is a graphical representation of the relationship between the voltage applied across the diode and the current flowing through it. This curve is non-linear and demonstrates the diode's fundamental property of allowing current to flow easily in one direction (forward bias) while restricting its flow in the opposite direction (reverse bias). The curve is typically plotted with voltage (V) on the x-axis and current (I) on the y-axis.
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### 1. Forward Bias Mode
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