BJIt Amplifiers Questions and Answers

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BJIt Amplifiers questions with answers cover one of the most fundamental topics in electronics aptitude. Understanding transistor biasing, small-signal analysis, and amplifier configurations like CE, CB, and CC is key for exams such as GATE, DRDO, and ISRO. This section presents multiple-choice aptitude questions with detailed explanations, helping students master amplifier characteristics, gain calculations, and frequency responses. Practicing these electronics aptitude questions builds confidence for competitive exams and placement tests requiring deep conceptual understanding of analog circuits.

BJIt Amplifiers

Showing 10 of 46 questions

1. Which of the following configurations has the lowest output impedance?

  • Fixed-bias
  • Voltage-divider
  • Emitter-follower
  • None of the above
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2. Which of the h-parameters corresponds to re in a common-base configuration?

  • hib
  • hfb
  • hrb
  • hob
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3. Which of the following is referred to as the reverse transfer voltage ratio?

  • hi
  • hr
  • hf
  • ho
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4. For a common-emitter amplifier, the purpose of swamping is

  • to minimize gain.
  • to reduce the effects of r'e
  • to maximize gain.
  • no purpose.
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5. What is the typical value of the current gain of a common-base configuration?

  • Less than 1
  • Between 1 and 50
  • Between 100 and 200
  • Undefined
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6. An emitter-follower is also known as a

  • common-emitter amplifier.
  • common-base amplifier.
  • common-collector amplifier.
  • Darlington pair.
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7. You have a need to apply an amplifier with a very high power gain. Which of the following would you choose?

  • common-collector
  • common-base
  • common-emitter
  • emitter-follower
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8. What is the voltage gain of a feedback pair connection?

  • 1
  • –1
  • 100
  • –100
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9. A common-emitter amplifier has ________ voltage gain, ________ current gain, ________ power gain, and ________ input impedance.

  • high, low, high, low
  • high, high, high, low
  • high, high, high, high
  • low, low, low, high
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10. The advantage that a Sziklai pair has over a Darlington pair is

  • higher current gain.
  • less input voltage is needed to turn it on.
  • higher input impedance.
  • higher voltage gain.
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