Comparison of Transistor Amplifier MCQ

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• What should be the gain of an amplifier at 20 kHz if the half power frequencies are fL = 20 Hz and fH = 15 kHz along with mid band gain = 80?
  ক

  22.76

  খ

  45.09

  গ

  40.08

  ঘ

  48.07
• The configuration in which output impedance of transistor amplifier is highest is ___________
  ক

  common collector

  খ

  common base

  গ

  common emitter

  ঘ

  common collector and base
• The configuration in which input impedance of transistor amplifier is lowest is ___________
  ক

  common collector

  খ

  common emitter

  গ

  common base

  ঘ

  common emitter & base
• The configuration in which current gain of transistor amplifier is lowest is ___________
  ক

  common collector

  খ

  common base

  গ

  common emitter

  ঘ

  common emitter & base
• The configuration in which voltage gain of transistor amplifier is lowest is ____________
  ক

  common collector

  খ

  common emitter

  গ

  common base

  ঘ

  common emitter & base
• Which capacitor is used to block DC portion by allowing to pass only AC portion of the amplified signal to load?
  ক

  Input Coupling Capacitor

  খ

  Bypass Capacitor

  গ

  Output Coupling Capacitor

  ঘ

  Both coupling and bypass capacitor
• What is the phase-shift between input and output voltages of CE amplifier?
  ক

  90°

  খ

  120°

  গ

  180°

  ঘ

  270°
• Which among the below assertions is not a relevant property of CE amplifier?
  ক

  High voltage gain

  খ

  High current gain

  গ

  High input resistance

  ঘ

  High output resistance
• What should be the level of input resistance to allow the occurrence of source loading in common base amplifier configuration?
  ক

  low

  খ

  high

  গ

  moderate

  ঘ

  stale
• Why is the Darlington configuration not suitable for more than two transistors?
  ক

  Because leakage current increases and voltage gain decreases with multiple numbers of transistors

  খ

  Because leakage current decreases and voltage gain increases with multiple numbers of transistors

  গ

  Because leakage current as well as voltage gain increases with multiple numbers of transistors

  ঘ

  Because leakage current as well as voltage gain decreases with multiple numbers of transistors
• Which type of amplifiers exhibits the current gain approximately equal to unity without any current amplification?
  ক

  CE

  খ

  CB

  গ

  CC

  ঘ

  Cascade