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प्रश्न
What are the valence-band and conduction-band occupancies in an insulator?
पर्याय
Electrons in the conduction band and holes in the valence band
Conduction band partially filled
Valence band and conduction band overlap
Valence band completely filled; conduction band completely empty
MCQ
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उत्तर
An insulator has a completely filled valence band and a completely empty conduction band. Its large energy gap prevents electrons from moving into the conduction band under normal conditions.
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