JAMB Physics 2007 Objective — Question 11
Question 11 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2007 Objective paper, with the correct answer and a full explanation.
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Silicon doped with aluminium and germanium doped with arsenic become
- A. n-type semiconductors, p-type semiconductors
- B. p-type semiconductors, n-type semiconductors
- C. n- and p-types respectively
- D. p- and n-types respectivelyCorrect
Explanation
Doping with a trivalent element (aluminium) produces a p-type semiconductor; doping with a pentavalent element (arsenic) produces an n-type semiconductor. So silicon+aluminium=p-type, germanium+arsenic=n-type.
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