MCQ
The battery connections required to forward bias a pn junction are ____________:
- A+ve terminal to p and -ve terminal to n
- B-ve terminal to p and +ve terminal to n
- C-ve terminal to p and -ve terminal to n
- DNone of these
✓
Answer
- +ve terminal to p and -ve terminal to n
Explanation:
To forward bias the p-n junction, the p side is made more positive, so that it is "downhill" for electron motion across the junction. An electron can move across the junction and fill a vacancy or "hole" near the junction. It can then move from vacancy to vacancy leftward toward the positive terminal, which could be described as the hole moving right. The conduction direction for electrons in the diagram is right to left, and the upward direction represents increasing electron energy.
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