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MCQs

Total Questions : 35 | Page 3 of 4 pages
Question 21. The purpose of capacitors in a transistor amplifier is to ___________
  1.    Protect the transistor
  2.    Cool the transistor
  3.    Couple or bypass a.c. component
  4.    Provide biasing
 Discuss Question
Answer: Option C. -> Couple or bypass a.c. component
Question 22. The purpose of a coupling capacitor in a transistor amplifier is to ___________
  1.    Increase the output impedance of transistor
  2.    Protect the transistor
  3.    Pass a.c. and block d.c.
  4.    Provide biasing
 Discuss Question
Answer: Option C. -> Pass a.c. and block d.c.
Question 23. If the input capacitor of a transistor amplifier is short-circuited, then
  1.    Transistor will be destroyed
  2.    Biasing conditions will change
  3.    Signal will not reach the base
  4.    None of the above
 Discuss Question
Answer: Option B. -> Biasing conditions will change
Question 24. The phase difference between the output and input voltages of a CE amplifier is ___________
  1.    180°
  2.    0°
  3.    90°
  4.    270°
 Discuss Question
Answer: Option A. -> 180°
Question 25. The ratio of output impedance of a CE amplifier is ___________
  1.    About 1
  2.    Low
  3.    High
  4.    Moderate
 Discuss Question
Answer: Option D. -> Moderate
Question 26. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is ___________
  1.    180°
  2.    270°
  3.    90°
  4.    0°
 Discuss Question
Answer: Option D. -> 0°
Question 27. In the a.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________
  1.    Short
  2.    Open
  3.    Partially open
  4.    None of the above
 Discuss Question
Answer: Option A. -> Short
Question 28. In the d.c. equivalent circuit of a transistor amplifier, the capacitors are considered ___________
  1.    Short
  2.    Open
  3.    Partially short
  4.    None of the above
 Discuss Question
Answer: Option B. -> Open
Question 29. The output power of a transistor amplifier is more than the input power because the additional power is supplied by ___________
  1.    Transistor
  2.    Biasing circuit
  3.    Collector supply VCC
  4.    None of the above
 Discuss Question
Answer: Option C. -> Collector supply VCC
Question 30. The purpose of d.c. conditions in a transistor is to ___________
  1.    Reverse bias the emitter
  2.    Forward bias the collector
  3.    Set up operating point
  4.    None of the above
 Discuss Question
Answer: Option C. -> Set up operating point

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