alleryWith no external energy supplied, the valence electrons all sit in the:
AValence band
BConduction band
CForbidden band
DVacuum region
Answer & Solution
Correct answer: A. Valence band
1. Energy is needed to lift an electron higher.
2. Without it, they stay where they are bound.
3. They reside in the valence band.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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