Amplifiers With Negative Feedback MCQ

Test your knowledge with important Amplifiers With Negative Feedback MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Amplifiers With Negative Feedback MCQs at Bissoy

• Emitter follower is used for ___________
  ক

  Current gain

  খ

  Impedance matching

  গ

  Voltage gain

  ঘ

  None of the above
• When current feedback (negative) is applied to an amplifier, its output impedance
  ক

  Is increased

  খ

  Is decreased

  গ

  Remains the same

  ঘ

  None of the above
• The value of negative feedback fraction is always ___________
  ক

  Less than 1

  খ

  More than 1

  গ

  Equal to 1

  ঘ

  None of the above
• If the feedback fraction of an amplifier is 0.01, then voltage gain with negative feedback is approximately___________
  ক

  500

  খ

  100

  গ

  1000

  ঘ

  5000
• If voltage feedback (negative) is applied to an amplifier, its output impedance ___________
  ক

  Remains the same

  খ

  Is increased

  গ

  Is decreased

  ঘ

  None of the above
• When current feedback (negative) is applied to an amplifier, its input impedance ___________
  ক

  Is decreased

  খ

  Is increased

  গ

  Remains the same

  ঘ

  None of the above
• When voltage feedback (negative) is applied to an amplifier, its input impedance ___________
  ক

  Is decreased

  খ

  Is increased

  গ

  Remains the same

  ঘ

  None of the above
• Negative feedback is employed in ___________
  ক

  Oscillators

  খ

  Rectifiers

  গ

  Amplifiers

  ঘ

  None of the above
• The output impedance of an emitter follower is ___________
  ক

  High

  খ

  Very high

  গ

  Almost zero

  ঘ

  Low
• The voltage gain of an emitter follower is ___________
  ক

  Much less than 1

  খ

  Approximately equal to 1

  গ

  Greater than 1

  ঘ

  None of the above
• The gain of an amplifier without feedback is 100 db. If a negative feedback of 3 db is applied, the gain of the amplifier will become ___________
  ক

  5 db

  খ

  300 db

  গ

  103 db

  ঘ

  97 db
• If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ___________
  ক

  10

  খ

  1

  গ

  1

  ঘ

  15
• When a negative voltage feedback is applied to an amplifier, its bandwidth___________
  ক

  Is increased

  খ

  Is decreased

  গ

  Remains the same

  ঘ

  Insufficient data
• When negative voltage feedback is applied to an amplifier, its voltage gain ___________
  ক

  Is increased

  খ

  Is reduced

  গ

  Remains the same

  ঘ

  None of the above
• An emitter follower has ___________ input impedance
  ক

  Zero

  খ

  Low

  গ

  High

  ঘ

  None of the above
• The gain of an amplifier with feedback is known as ___________ gain
  ক

  Resonant

  খ

  Open loop

  গ

  Closed loop

  ঘ

  None of the above
• A feedback circuit usually employs ___________ network
  ক

  Resistive

  খ

  Capacitive

  গ

  Inductive

  ঘ

  None of the above
• Emitter follower is a ___________ circuit
  ক

  Voltage feedback

  খ

  Current feedback

  গ

  Both voltage and current feedback

  ঘ

  None of the above