MHT CET 2025 Physics question

Not in JEE Advanced syllabus

Which of the following statements is TRUE for n-type semiconductor?

(A)Holes are majority carriers and trivalent atoms are dopants.
(B)Electrons are majority carriers and trivalent atoms are dopants.
(C)Holes are minority carriers and pentavalent atoms are dopants.Correct
(D)Electrons are minority carriers and pentavalent atoms are dopants.

Answer: (C)

Solution

An n-type semiconductor is made by doping pure Si/Ge with a pentavalent impurity (P, As, Sb). Four of its five valence electrons form covalent bonds and the fifth becomes a free electron, so electrons are the majority carriers, while thermally generated holes are the minority carriers. Option (C)

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Question ID VK-102455