IGNOU BEY 12 2026 - Explain and draw v - i relation of a diode.

Question

Explain and draw v - i relation of a diode.

06 Mar 2026

Answer :

Word Count : 508

A diode is a semiconductor device that allows current to flow in only one direction, while blocking current in the opposite direction. This unidirectional property is essential in various applications like rectification in power supplies, signal demodulation, and protection circuits. The relationship between the voltage (V) across a diode and the current (I) flowing through it is nonlinear and can be described by the Shockley diode equation: [ I = I_0 \left( e^{\frac{V}{nV_T}} - 1 \right) ] Where: * ( I ) is the current through the diode. * ( I_0 ) is the saturation current (a small constant value, typically in the nanoampere range). * ( V ) is the voltage applied across the diode. * ( n ) is the ideality factor (typically close to 1 for ideal diodes). * ( V_T ) is the thermal voltage, which is approximately 26 mV at room temperature (300K). For low voltages (when ( V ) is negative or close to 0), the current

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