Which one of the following is not a semi conductor:
Correct answer: B. Copper
- A. Silicon
- B. Copper
- C. Gallium arsenide
- D. Germinium
Explanation
Copper is a metal and all metals are conductors because they have free electrons. Silicon, germanium and gallium arsenide are semi-conductors and they only allow current to flow under specific conditions.
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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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