Which one of the following statement is false? (a) Pure Si doped with trivalent impurities gives a p-type semiconductor. (b) Majority carries in a n-type semiconductor are holes. (c) Minority carries in a p-type semiconductor are electrons. (d) The resistance of intrinisic semiconductor decreases with increase of temperature.

Answer: (b). (a) Trivalent doping gives p-type: true. (b) In n-type the majority carriers are electrons, not holes: false. (c) Minority carriers in p-type are electrons: true. (d) Intrinsic resistance falls as T rises: true. So the false statement is (b).

Which one of the following statement is false? | NEET 2010 (AIPMT, Prelims)

Q52NEET 2010 · AIPMT · PRELIMSEasy

Intrinsic & Extrinsic Semiconductors

Which one of the following statement is false?

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Answer: (b)

(a) Trivalent doping gives p-type: true.
(b) In n-type the majority carriers are electrons, not holes: false.
(c) Minority carriers in p-type are electrons: true. (d) Intrinsic resistance falls as $T$ rises: true.
So the false statement is (b).

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