WAEC Physics 2018 Theory — Question 5

Question 5 of 27 from the West African Examinations Council (WAEC) Physics 2018 Theory paper, with the correct answer and a full explanation.

4.(a) What is an intrinsic semiconductor?

Model answer

An intrinsic semiconductor is a chemically pure semiconductor containing no impurities, whose (low) conductivity arises only from thermally generated electron-hole pairs.

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