alleryDespite extra carriers, a doped crystal as a whole is:
AElectrically neutral
BNegatively charged
CPositively charged
DWeakly magnetised
Answer & Solution
Correct answer: A. Electrically neutral
1. Each extra carrier came from an ionised dopant core.
2. The core has the opposite charge.
3. So the crystal stays neutral overall.
_Source: syllabus Physics Part II, Chapter 14, Semiconductor Electronics._
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