In the breakdown region, Zener behaves like a:
Correct answer: B. Constant voltage
- A. Constant current
- B. Constant voltage
- C. Constant resistance
- D. None of them
Explanation
When the reverse voltage across a zener diode exceeds the breakdown voltage VZ, the current increases very sharply. In this region, the curve is almost vertical. It means voltage across zener diode is constant at VZ, even though the current through it changes. Therefore, a zener diode behaves as a constant voltage source.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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