N-Type Semiconductor objective questions and answers

11. In semiconductor the forbidden energy gap lies

   A.Just below the conduction band

   B.Just above the conduction band

   C.Either above or below the conduction band

   D.Between the valence band and conduction band

12. Which of the following cannot exist outside a semiconductor

   A.Hole

   B.Electron

   C.Both (a) and (b)

   D.None of the above

13. In a N-type semiconductor, the positive of the Fermi level

   A.Is at the centre of the energy gap

   B.Is lower than the centre of energy gap

   C.Is higher than the centre of energy gap

   D.Can be anywhere depending upon the doping concentration

14. As the temperature of a semiconductor increases its

   A.Conductivity increases

   B.Resistivity increases

   C.Atomic number decreases

   D.Temperature co-efficient becomes zero

15. Which of the following doping elements would not be suitable for converting intrinsic semiconductor

   A.Phosphorous

   B.Indium

   C.Antimony

   D.Arsenic

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