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Home ‣ Electronics ‣ Operational Amplifiers Comments
  • Question

  • A virtual ground is a ground for current, but not for voltage.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • Operational Amplifiers problems

    Search Results

    • 1. Changing the input voltage to an op-amp circuit will change its voltage gain.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. An operational amplifier contains a differential amplifier, a voltage amplifier, and an output amplifier.

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    • A. True
    • B. False
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    • 3. This circuit is a voltage follower.


    • Options
    • A. True
    • B. False
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    • 4. If the frequency of an astable multivibrator is 54.86 kHz then its period is 1.82 s.

    • Options
    • A. True
    • B. False
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    • 5. The voltage-follower amplifier circuit has a fixed voltage gain of approximately 10.

    • Options
    • A. True
    • B. False
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    • 6. Current actually flows into or out of a virtual ground.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. An open feedback resistor in an inverting or noninverting op-amp circuit can cause severe clipping of the output signal.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. An S-R flip-flop is an example of a bistable multivibrator circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The frequency of a crystal is dependent on how much voltage is applied to activate it.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by two.

    • Options
    • A. True
    • B. False
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