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JAMB Physics 2005 Question 8

Question 8

Electronics

A silicon material is dopped with an element of a certain group and an n-type semi-conductor is formed. The most likely group of the element is

  1. A.II.
  2. B.I.
  3. C.V.
  4. D.III.
Show the answer and explanation

Answer: C (V.)

Explanation

n-type silicon is made by adding a group V (pentavalent) element, whose fifth electron becomes a free carrier.