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Intrinsic and extrinsic semiconductors
Concepts tested here
- Majority and minority carriers
All Questions
2010 AIPMT-PRE 1 question
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Which of the following statements is false?With rise in temperature more covalent bonds break in an intrinsic semiconductor, more electron–hole pairs are produced and its resistance decreases (true).
A trivalent impurity (B, Al, In) has one electron less than Si and creates a hole, giving a p-type semiconductor (true).
In a p-type semiconductor holes are the majority carriers and electrons are the minority carriers (true).
An n-type semiconductor is made with a pentavalent impurity that donates electrons, so its majority carriers are electrons, and holes are the minority carriers.
Hence the false statement is that majority carriers in an n-type semiconductor are holes.