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MCQs

Total Questions : 122 | Page 8 of 13 pages
Question 71. The emitter of a transistor is ___________ doped
  1.    lightly
  2.    heavily
  3.    moderately
  4.    none of the above
 Discuss Question
Answer: Option B. -> heavily
Question 72. The base resistor method is generally used in
  1.    Amplifier circuits
  2.    Switching circuits
  3.    Rectifier circuits
  4.    None of the above
 Discuss Question
Answer: Option B. -> Switching circuits
Question 73. The number of depletion layers in a transistor is ___________
  1.    four
  2.    three
  3.    one
  4.    two
 Discuss Question
Answer: Option D. -> two
Question 74. In voltage divider bias, operating point is 3 V, 2 mA. If VCC = 9 V, RC = 2.2 kΩ, what is the value of RE ?
  1.    2000 Ω
  2.    1400 Ω
  3.    800 Ω
  4.    1600 Ω
 Discuss Question
Answer: Option C. -> 800 Ω
Question 75. The element that has the biggest size in a transistor is ___________
  1.    collector
  2.    base
  3.    emitter
  4.    collector-base-junction
 Discuss Question
Answer: Option A. -> collector
Question 76. The input impedance of a transistor is ___________
  1.    high
  2.    low
  3.    very high
  4.    almost zero
 Discuss Question
Answer: Option B. -> low
Question 77. The output impedance of a transistor is ___________
  1.    high
  2.    zero
  3.    low
  4.    very low
 Discuss Question
Answer: Option A. -> high
Question 78. The value of a of a transistor is ___________
  1.    more than 1
  2.    less than 1
  3.    1
  4.    none of the above
 Discuss Question
Answer: Option B. -> less than 1
Question 79. The most commonly used semiconductor in the manufacture of a transistor is ___________
  1.    germanium
  2.    silicon
  3.    carbon
  4.    none of the above
 Discuss Question
Answer: Option B. -> silicon
Question 80. A heat sink is generally used with a transistor to ___________
  1.    increase the forward current
  2.    decrease the forward current
  3.    compensate for excessive doping
  4.    prevent excessive temperature rise
 Discuss Question
Answer: Option D. -> prevent excessive temperature rise

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