In a semiconductors the charge carriers are ___________________?
Correct answer: C. Electron and holes both
- A. Holes only
- B. Electrons only
- C. Electron and holes both
- D. All of the above
Explanation
Semiconductors conduct through both free electrons in the conduction band and holes in the valence band. Students may choose b by remembering that electrons are the majority carriers in n-type material, but holes also exist as minority carriers there, and vice versa in p-type material.
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About PN Junction
A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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