WAEC Physics 2018 Theory — Question 6
Question 6 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.
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4.(b) Distinguish between the p-type and n-type semiconductors.
Model answer
N-type: majority carriers are electrons, minority carriers are holes; formed by adding pentavalent (donor) impurities; donor density exceeds acceptor density. P-type: majority carriers are holes, minority carriers are electrons; formed by adding trivalent (acceptor) impurities; acceptor density exceeds donor density.
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