When the temperature of semiconductor suddenly drops to zero kelvin, thena semiconductor acts as:
Correct answer: D. Insulator
- A. Conductor
- B. Semi-conductor
- C. Super conductor
- D. Insulator
Explanation
When the temperature of a semiconductor drops to absolute zero, the semiconductor behaves as an insulator. At absolute zero, the valence electrons in a semiconductor come to rest, and the energy band gap between the valence band and the conduction band becomes very large. This large energy gap prevents the movement of electrons, resulting in a lack of conductivity. Therefore, at zero Kelvin, a semiconductor acts as an insulator rather than a conductor, semiconductor or superconductor.
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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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