MCQ
The main cause of Zener breakdown is:
- AThe base semiconductor being germanium.
- BProduction of electron-hole pairs due to thermal excitation.
- CLow doping.
- ✓High doping.
✓
Answer
Correct option: D.
High doping.
Zener breakdown occurs in heavily doped $p-n$ junctions. The heavy doping makes the depletion layer extremely thin. So that, carriers cannot accelerate enough to cause ionization. Thus, current will increase in reverse bias only due to reverse breakdown voltage.
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