How does a p-n junction diode work and what are its applications in NCERT Solutions for Class 12 Physics Chapter 14 Semiconductor Electronic
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1 Answer
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As the name suggests, a p-n junction diode means an n-type and p-type semiconductor joined together. At the junction, they form a depletion region. In forward bias where n is connected to negative and p to positive, the barrier potential reduces, allowing the current to flow. In reverse bias, there is a tiny leakage but the current is blocked and the barrier increases. This one-way behaviour is ideal for signal demodulation, rectification (converting AC to DC) and voltage regulation. They are the basic or fundamental components in logic gates, power supplies and communication systems offering efficiency, high-speed and reliability.
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