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MCQs

Total Questions : 122 | Page 12 of 13 pages
Question 111. The disadvantage of voltage divider bias is that it has ___________
  1.    High stability factor
  2.    Low base current
  3.    Many resistors
  4.    None of the above
 Discuss Question
Answer: Option C. -> Many resistors
Question 112. In voltage divider bias, VCC = 25 V; R1 = 10 kΩ; R2 = 2.2 V ; RC = 3.6 V and RE =1 kΩ. What is the emitter voltage?
  1.    7 V
  2.    3 V
  3.    5 V
  4.    8 V
 Discuss Question
Answer: Option D. -> 8 V
Question 113. The voltage gain of a tuned amplifier is ___________ at resonant frequency
  1.    Minimum
  2.    Maximum
  3.    Half-way between maximum and minimum
  4.    Zero
 Discuss Question
Answer: Option B. -> Maximum
Question 114. In series resonance, there is ___________
  1.    Voltage amplification
  2.    Current amplification
  3.    Both voltage and current amplification
  4.    None of the above
 Discuss Question
Answer: Option A. -> Voltage amplification
Question 115. In parallel resonance, there is ___________
  1.    Both voltage and current amplification
  2.    Voltage amplifications
  3.    Current amplification
  4.    None of the above
 Discuss Question
Answer: Option C. -> Current amplification
Question 116. The zero signal IC is generally ___________ mA in the initial stages of a transistor amplifier
  1.    4
  2.    1
  3.    3
  4.    More than 10
 Discuss Question
Answer: Option B. -> 1
Question 117. For proper operation of the transistor, its collector should have ___________
  1.    Proper forward bias
  2.    Proper reverse bias
  3.    Very small size
  4.    None of the above
 Discuss Question
Answer: Option B. -> Proper reverse bias
Question 118. Thermal runaway occurs when ___________
  1.    Collector is reverse biased
  2.    Transistor is not biased
  3.    Emitter is forward biased
  4.    Junction capacitance is high
 Discuss Question
Answer: Option B. -> Transistor is not biased
Question 119. In a particular biasing circuit, the value of RE is about
  1.    10 kΩ
  2.    1 MO
  3.    100 kΩ
  4.    800 O
 Discuss Question
Answer: Option D. -> 800 O
Question 120. A class C amplifier always drives ___________ load
  1.    A pure resistive
  2.    A pure inductive
  3.    A pure capacitive
  4.    A resonant tank
 Discuss Question
Answer: Option D. -> A resonant tank

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