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JAMB Physics 1999 Question 46

Question 46

Electronics

In semi-conductors, the carriers of current at room temperature are

  1. A.electrons only
  2. B.electrons and holes
  3. C.holes only
  4. D.electrons and ions.
Show the answer and explanation

Answer: B (electrons and holes)

Explanation

In a semiconductor, current is carried by free electrons and by holes (missing electrons) moving the other way.