Which one of the following has the greatest energy gap ?
Correct answer: A. insulator
- A. insulator
- B. conductor
- C. semi conductor
- D. any of aboveOrdering Wholesale Electronic Components For Circuits
Explanation
Insulators have the largest forbidden energy gap, so electrons require much more energy to move from the valence band to the conduction band. Conductors have overlapping or very small effective gaps, while semiconductors have intermediate gaps. The likely mistake is choosing semiconductor because it has a noticeable band gap, but its gap is smaller than that of an insulator.
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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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