alleryThe impurity added to a semiconductor is measured in parts per:
AThousand
BBillion
CMillion
DHundred
Answer & Solution
Correct answer: C. Million
1. Only a tiny quantity of impurity is needed.
2. Even that raises the conductivity manifold.
3. The amount is a few parts per million.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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