In forward biasing, the knee voltage for Germanium PN-Junction is:
Correct answer: A. 0.3 V
- A. 0.3 V
- B. 0.7 V
- C. 3 V
- D. 7 V
Explanation
The correct answer is Option A: 0.3 V. Germanium PN-junction diodes have a typical knee voltage of about 0.3 V when forward biased. This is due to the smaller bandgap of Germanium compared to Silicon, which has a knee voltage of approximately 0.7 V. Option B incorrectly applies the knee voltage of Silicon to Germanium. Options C and D suggest knee voltages that are unrealistically high for any standard PN-junction diodes, making them incorrect.
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A p-n junction forms when p-type and n-type semiconductor regions meet, creating a depletion layer, barrier potential and rectifying action. The work covers forward and reverse bias, junction current, diode characteristics, and how a diode converts alternating current into pulsating direct current through half-wave and full-wave rectification.
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