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In an intrinsic semiconductor, how do the electron and hole concentrations compare?
AThey are unrelated
BThey are alternating
CThey are equal
DThey are opposite
Answer & Solution
Correct answer: C. They are equal
1. In a pure semiconductor every free electron leaves a hole behind.
2. The two are created strictly in pairs.
3. That is the electron and hole concentrations are equal to the intrinsic carrier concentration.
4. So they are equal.
_Source: NCERT Class XII Physics Part II, Ch 14 'Semiconductor Electronics'_
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