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Home ‣ Electronics ‣ Operational Amplifiers Comments
  • Question

  • If the two inputs to a differential amplifier are exactly the same, then the output is the signal multiplied by 2.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • Operational Amplifiers problems

    Search Results

    • 1. If an input signal is applied to the inverting input of an op-amp with the noninverting input grounded, the output signal would be opposite in polarity to the input.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. An inverting amplifier has a phase shift of 180° from input to output.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. 

      The output voltage is _____ at the resonant frequency in the given circuit.


    • Options
    • A. 0 mV
    • B. 31.4 mV
    • C. 66.5 mV
    • D. 380 mV
      • Discuss
    • 4. 

      The voltage across the inductor is ______ in the given circuit.


    • Options
    • A. 6.5 V
    • B. 12.4 V
    • C. 14 V
    • D. 50 V
      • Discuss
    • 5. 

      The phase angle is ______ in the given circuit.


    • Options
    • A. 34.5°
    • B. 43.3°
    • C. 46.7°
    • D. 55.5°
      • Discuss
    • 6. The ideal output impedance for an operational amplifier is 0 Ω.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Crystal oscillator circuits have a very low Q.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Feedback is used in an open-loop operational amplifier circuit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. An astable multivibrator has two states.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The feedback resistor adds to the gain of an op-amp.

    • Options
    • A. True
    • B. False
      • Discuss

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