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MCQs

Total Questions : 67 | Page 1 of 7 pages
Question 1. The strength of a semiconductor crystal comes from
  1.    Forces between nuclei
  2.    Forces between protons
  3.    Electron-pair bonds
  4.    None of the above
 Discuss Question
Answer: Option C. -> Electron-pair bonds
Question 2. The impurity level in an extrinsic semiconductor is about of pure semiconductor.
  1.    10 atoms for 108 atoms
  2.    1 atom for 108 atoms
  3.    1 atom for 104 atoms
  4.    1 atom for 100 atoms
 Discuss Question
Answer: Option B. -> 1 atom for 108 atoms
Question 3. A hole and electron in close proximity would tend to ___________
  1.    Repel each other
  2.    Attract each other
  3.    Have no effect on each other
  4.    None of the above
 Discuss Question
Answer: Option B. -> Attract each other
Question 4. A semiconductor has generally ___________ valence electrons.
  1.    2
  2.    3
  3.    6
  4.    4
 Discuss Question
Answer: Option D. -> 4
Question 5. A pentavalent impurity has ___________ Valence electrons
  1.    3
  2.    5
  3.    4
  4.    6
 Discuss Question
Answer: Option B. -> 5
Question 6. A forward biased pn junction diode has a resistance of the order of
  1.    Ω
  2.    kΩ
  3.    MΩ
  4.    None of the above
 Discuss Question
Answer: Option A. -> Ω
Question 7. A reverse biased pn junction has resistance of the order of
  1.    Ω
  2.    kΩ
  3.    MΩ
  4.    None of the above
 Discuss Question
Answer: Option C. -> MΩ
Question 8. A semiconductor has ___________ temperature coefficient of resistance.
  1.    Positive
  2.    Zero
  3.    Negative
  4.    None of the above
 Discuss Question
Answer: Option C. -> Negative
Question 9. At room temperature, an intrinsic semiconductor has ___________
  1.    Many holes only
  2.    A few free electrons and holes
  3.    Many free electrons only
  4.    No holes or free electrons
 Discuss Question
Answer: Option B. -> A few free electrons and holes
Question 10. At absolute temperature, an intrinsic semiconductor has ___________
  1.    A few free electrons
  2.    Many holes
  3.    Many free electrons
  4.    No holes or free electrons
 Discuss Question
Answer: Option D. -> No holes or free electrons

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