Exam-style question
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What is the primary function of a Zener diode compared to an ordinary diode?.
- A.Zener diodes allow current to flow in one direction only.
- B.Zener diodes can operate in reverse breakdown to regulate voltage.
- C.Ordinary diodes can operate in reverse breakdown to regulate voltage.
- D.Zener diodes have a higher forward voltage drop than ordinary diodes.
Model answer
What a good answer should say
- Zener diodes can operate in reverse breakdown to regulate voltage.
Explanation
Why this works
Zener diodes are designed to allow current to flow in reverse when a specific breakdown voltage is reached, which is their key difference from ordinary diodes that do not conduct in reverse. Zener diodes are used in voltage regulation applications, while ordinary diodes are typically used for rectification.
This distinction is crucial in circuits where voltage stabilization is required.
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