alleryIf a gap leaves the valence electrons all bound, the material is an:
AConductor
BAmplifier
COscillator
DInsulator
Answer & Solution
Correct answer: D. Insulator
1. No free electrons are available in the conduction band.
2. So no current can be carried.
3. The material is an insulator.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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