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A doped semiconductor is described as:

AExtrinsic
BIntrinsic
CInsulating
DConducting
Answer & Solution
Correct answer: A. Extrinsic
1. An undoped crystal is intrinsic. 2. Doping adds carriers from outside the pure lattice. 3. The doped material is called extrinsic. 4. So the answer is extrinsic. _Source: syllabus Physics, Ch 14 'Semiconductor Electronics'_
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