Many of the semi conductors are crystals of the type__________________?
Correct answer: A. Face centred cubic
- A. Face centred cubic
- B. Body centred cubic
- C. Simple cubic
- D. All of the above
Explanation
Common elemental semiconductors such as silicon and germanium have the diamond cubic structure, whose underlying Bravais lattice is face-centred cubic. Students may choose d because semiconductor crystals can have different detailed structures, but the standard examples referred to here are classified as FCC-based crystals.
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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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