Choose the correct statement for the energy band structure of a semiconductor:
Correct answer: B. At absolute zero temperature, the conduction band of semiconductor is totally empty and valance band is totally filled
- A. At absolute zero temperature, the conduction band of semiconductor is completely filled and valance band is totally empty
- B. At absolute zero temperature, the conduction band of semiconductor is totally empty and valance band is totally filled
- C. At absolute zero temperature, both conduction band and valance band of semiconductor are totally empty
- D. At absolute zero temperature, both conduction band and valance band of semiconductor are completely filled
Explanation
The valence band is fully filled and the conduction band is completely empty at T = 0 K because it is the semiconductor's identity that it becomes an insulator at absolute zero.
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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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