A Zener diode is normally operated
Correct answer: B. in reverse bias at its breakdown voltage, as a voltage regulator
- A. in forward bias as a rectifier
- B. in reverse bias at its breakdown voltage, as a voltage regulator
- C. with no bias at all
- D. only at very high frequency
Explanation
Beyond the breakdown voltage a Zener conducts heavily while the voltage across it stays almost constant, which makes it a simple and effective voltage reference. Unlike an ordinary diode this breakdown is non destructive provided a series resistor limits the current. In forward bias it behaves like any other silicon diode.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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