Draw circuit arrangement for studying V-I characteristics of a p-n junction
diode.
(b) Show the shape of the characteristics of a diode.
(c) Mention two
information that you can get from these characteristics.
(b) Show the shape of the characteristics of a diode.
(c) Mention two information that you can get from these characteristics.
Show Hint
Solution and Explanation
Circuit for V-I Characteristics of a p-n Junction Diode: The setup involves a power supply, a p-n junction diode, and a variable resistor in series. A voltmeter measures the voltage across the diode, and an ammeter measures the current in series.
Diode Characteristic Shape: The V-I characteristics show a rapid current rise when the forward voltage surpasses a threshold (around 0.7V for silicon). In reverse bias, current is minimal until breakdown at a high reverse voltage.
Information from Characteristics: 1. The threshold voltage (cut-off voltage) for forward conduction. 2. The reverse saturation current, the small current under reverse bias before significant conduction. The V-I characteristics thus reveal the diode's forward threshold and reverse bias behavior.
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