Materials in which valence electrons are tightly bound to their atoms at low temperature are called___________________?
Correct answer: C. Insulators
- A. Semi conductor
- B. Super conductors
- C. Insulators
- D. Conductor
Explanation
Insulators have valence electrons strongly bound to their atoms, so very few electrons are available for electrical conduction, especially at low temperature. Semiconductors, the likely alternative, have more weakly bound electrons and conductivity between that of conductors and insulators.
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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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