Exam-style question
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What is the primary function of a Zener diode in a voltage regulator circuit?.
- A.To amplify the voltage.
- B.To allow current to flow in one direction only.
- C.To maintain a constant output voltage.
- D.To convert AC to DC.
Model answer
What a good answer should say
- To maintain a constant output voltage.
Explanation
Why this works
A Zener diode is used in voltage regulator circuits to maintain a constant output voltage despite variations in input voltage or load conditions. It achieves this by entering reverse breakdown at a specified voltage.
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