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MCQs

Total Questions : 67 | Page 6 of 7 pages
Question 51. . Which semiconductor material is made from coal ash?
  1.    germanium
  2.    silicon
  3.    tin
  4.    carbon
 Discuss Question
Answer: Option A. -> germanium
Question 52. . When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?
  1.    energy gap
  2.    hole
  3.    electron-hole pair
  4.    recombination
 Discuss Question
Answer: Option B. -> hole
Question 53. . Forward bias of a silicon P-N junction will produce a barrier voltage of approximately how many volts?
  1.    0.2
  2.    0.3
  3.    0.7
  4.    0.8
 Discuss Question
Answer: Option C. -> 0.7
Question 54. . Silicon atoms combine into an orderly pattern called a:
  1.    covalent bond
  2.    crystal
  3.    semiconductor
  4.    valence orbit
 Discuss Question
Answer: Option B. -> crystal
Question 55. . 
Elements with 1, 2, or 3 valence electrons usually make excellent:
  1.    conductors
  2.    semiconductors
  3.    insulators
  4.    neutral
 Discuss Question
Answer: Option A. -> conductors
Question 56. . What can a semiconductor sense?
  1.    magnetism
  2.    temperature
  3.    pressure
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 57. . In "p" type material, minority carriers would be:
  1.    holes
  2.    dopants
  3.    slower
  4.    electrons
 Discuss Question
Answer: Option D. -> electrons
Question 58. . Which material may also be considered a semiconductor element?
  1.    carbon
  2.    ceramic
  3.    mica
  4.    argon
 Discuss Question
Answer: Option A. -> carbon
Question 59. . A commonly used pentavalent material is:
  1.    arsenic
  2.    boron
  3.    gallium
  4.    neon
 Discuss Question
Answer: Option A. -> arsenic
Question 60. . In "n" type material, majority carriers would be:
  1.    holes
  2.    dopants
  3.    slower
  4.    electrons
 Discuss Question
Answer: Option D. -> electrons

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