alleryWhen the conduction band overlaps the valence band, the material is a:
APure semiconductor
BMagnetic material
CMetallic conductor
DPerfect insulator
Answer & Solution
Correct answer: C. Metallic conductor
1. Overlap means electrons need no energy to move up.
2. They can move freely into the higher band.
3. That is the case with metallic conductors.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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