Quick Answer: The PN Junction Diode Apparatus Two Meter is used to study the V-I characteristics of a PN junction diode, with a two-meter arrangement for observing voltage and current together.
Last updated: October 2026
Key Features
Two-meter arrangement for simultaneous voltage and current readings
Forward-bias and reverse-bias diode experiments
Supports plotting of V-I characteristic curves
Introduces threshold voltage, leakage current and rectification
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Students identify the voltage meter, current meter, diode terminals and bias controls, wire the circuit to the experiment diagram and start from the minimum setting of the low-voltage supply. Raising the voltage gradually and recording both meters, then repeating in reverse bias if the apparatus supports it, gives the data for a V-I graph showing the diode's conduction region.
Frequently Asked Questions
Q1. Why does the apparatus use two meters? The two-meter arrangement lets students read the applied voltage and the diode current at the same time while plotting the V-I characteristic.
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