A photo diode is a semi-conductor device usually made from_:
Correct answer: D. Silicon
- A. Nitrogen
- B. Oxygen
- C. Carbon
- D. Silicon
Explanation
A photodiode is a semiconductor device typically made from materials like silicon or germanium. These materials are used due to their light-sensitive properties, allowing the photodiode to convert light energy into electrical current. Silicon-based photodiodes are more common due to their efficiency, cost-effectiveness, and compatibility with semiconductor fabrication processes.
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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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