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MCQs

Total Questions : 122 | Page 9 of 13 pages
Question 81. For germanium transistor amplifier, VCE should ___________ for faithful amplification
  1.    Be zero
  2.    Be 0.2 V
  3.    Not fall below 0.7 V
  4.    None of the above
 Discuss Question
Answer: Option C. -> Not fall below 0.7 V
Question 82. For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than
  1.    10 IB
  2.    3 IB
  3.    2 IB
  4.    4 IB
 Discuss Question
Answer: Option A. -> 10 IB
Question 83. In a base resistor method, if the value of ß changes by 50, then collector current will change by a factor
  1.    25
  2.    50
  3.    100
  4.    200
 Discuss Question
Answer: Option B. -> 50
Question 84. The operating point is also called the ___________
  1.    Cut off point
  2.    Quiescent point
  3.    Saturation point
  4.    None of the above
 Discuss Question
Answer: Option B. -> Quiescent point
Question 85. In the design of a biasing circuit, the value of collector load RC is determined by ___________
  1.    VCE consideration
  2.    VBE consideration
  3.    IB consideration
  4.    None of the above
 Discuss Question
Answer: Option A. -> VCE consideration
Question 86. The operating point ___________ on the a.c. load line
  1.    Also line
  2.    Does not lie
  3.    May or may not lie
  4.    Data insufficient
 Discuss Question
Answer: Option A. -> Also line
Question 87. In a parallel LC circuit, if the input signal frequency is increased above resonant frequency then ___________
  1.    XL increases and XC decreases
  2.    XL decreases and XC increases
  3.    Both XL and XC increase
  4.    Both XL and XC decrease
 Discuss Question
Answer: Option A. -> XL increases and XC decreases
Question 88. At the base emitter junctions of a transistor, one finds ___________
  1.    a reverse bias
  2.    a wide depletion layer
  3.    low resistance
  4.    none of the above
 Discuss Question
Answer: Option C. -> low resistance
Question 89. The current IB is ___________
  1.    electron current
  2.    hole current
  3.    donor ion current
  4.    acceptor ion current
 Discuss Question
Answer: Option A. -> electron current
Question 90. At parallel resonance, the ratio L/C is ___________
  1.    Very large
  2.    Zero
  3.    Small
  4.    None of the above
 Discuss Question
Answer: Option A. -> Very large

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