Question

Why do we use zener diode?

Answer 1

Answer:

Zener diodes are used for voltage regulation, as reference elements, surge suppressors, and in switching applications and clipper circuits. The load voltage equals breakdown voltage VZ of the diode. The series resistor limits the current through the diode and drops the excess voltage when the diode is conducting.

Explanation:

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Answer 2

We use the Zener diode as a voltage regulator in circuits.

• A Zener diode is a type of diode which is excessively doped and constructed to work in the reverse voltage.
• For regulating voltage across minor loads, a Zener diode is used as a shunt voltage regulator.
• Zener diodes have a stable breakdown voltage throughout a large current range. To reverse bias the load, a Zener diode is connected parallel to the load, and after the Zener diode exceeds knee voltage, the voltage across the load remains constant.

Thus, we use the Zener diode as a voltage regulator.