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An intrinsic semiconductor at room temperature has:
AMore electrons in the conduction band than holes in the valence band
BEqual numbers of electrons and holes contributing to conduction
CMore holes than free electrons at all temperatures considered
DZero charge carriers, since it is purely the silicon crystal
Answer & Solution
Correct answer: B. Equal numbers of electrons and holes contributing to conduction
In an intrinsic (undoped) semiconductor, every thermally excited electron leaves a hole, so $n_e = n_h$.
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