alleryThe conductivity of a semiconductor is improved by adding:
ACoolants
BImpurities
CInsulators
DMagnets
Answer & Solution
Correct answer: B. Impurities
1. A pure semiconductor conducts too poorly to be useful.
2. Something must be added to raise its conductivity.
3. That is a small amount of impurity.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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