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MCQs

Total Questions : 35 | Page 2 of 4 pages
Question 11. In transistor amplifiers, we generally use ___________ capacitors.
  1.    Electrolytic
  2.    Mica
  3.    Paper
  4.    Air
 Discuss Question
Answer: Option A. -> Electrolytic
Question 12. The input capacitor in an amplifier is the ___________ capacitor
  1.    Coupling
  2.    Bypass
  3.    Leakage
  4.    None of the above
 Discuss Question
Answer: Option A. -> Coupling
Question 13. The slope of a.c. load line is ___________ that of d.c. load line
  1.    The same as
  2.    More than
  3.    Less than
  4.    None of the above
 Discuss Question
Answer: Option B. -> More than
Question 14. A single stage transistor amplifier contains ___________ and associated circuitry
  1.    Two transistors
  2.    One transistor
  3.    Three transistor
  4.    None of the above
 Discuss Question
Answer: Option B. -> One transistor
Question 15. In a CE amplifier, voltage gain = ___________ x RAC/Rin
  1.    α
  2.    (1 + α)
  3.    (1+ β)
  4.    β
 Discuss Question
Answer: Option D. -> β
Question 16. CC configuration is used for impedance matching because its ___________
  1.    Input impedance is very high
  2.    Input impedance is low
  3.    Output impedance is very low
  4.    None of the above
 Discuss Question
Answer: Option A. -> Input impedance is very high
Question 17. If a transistor amplifier draws 2mA when input voltage is 10 V, then its input impedance is ___________
  1.    20 kΩ
  2.    2 kΩ
  3.    10 kΩ
  4.    5 kΩ
 Discuss Question
Answer: Option D. -> 5 kΩ
Question 18. The value of collector load RC in a transistor amplifier is ___________ the output impedance of the transistor.
  1.    The same as
  2.    Less than
  3.    More than
  4.    None of the above
 Discuss Question
Answer: Option B. -> Less than
Question 19. The purpose of emitter capacitor (i.e. capacitor across RE) is to ___________
  1.    Avoid voltage gain drop
  2.    Forward bias the emitter
  3.    Reduce noise in the amplifier
  4.    None of the above
 Discuss Question
Answer: Option A. -> Avoid voltage gain drop
Question 20. A single stage transistor amplifier with no load sees an a.c. load of
  1.    RC + RE
  2.    RC
  3.    RC || RE
  4.    RC/RE
 Discuss Question
Answer: Option B. -> RC

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