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  • Question

  • What value of input resistance is needed in the given circuit to produce the given output voltage? 5

    What value of input resistance is needed in the given circuit to produce the given output voltage?


  • Options
  • A. 50 Ω
  • B. 4 kΩ
  • C. 4.08 kΩ
  • D. 5 kΩ

  • Correct Answer
  • 4 kΩ 

    • Operational Amplifiers problems

    Search Results

    • 1. All of the following are basic op-amp input modes of operation EXCEPT

    • Options
    • A. inverting mode
    • B. common-mode
    • C. double-ended
    • D. single-ended
      • Discuss
    • 2. A series dissipative regulator is an example of a:

    • Options
    • A. linear regulator
    • B. switching regulator
    • C. shunt regulator
    • D. dc-to-dc converter
      • Discuss
    • 3. An ideal amplifier should have:

    • Options
    • A. high input current
    • B. zero offset
    • C. high output impedance
    • D. moderate gain
      • Discuss
    • 4. With negative feedback, the returning signal:

    • Options
    • A. aids the input signal
    • B. is proportional to output current
    • C. opposes the input signal
    • D. is proportional to differential voltage gain
      • Discuss
    • 5. An ideal operational amplifier has

    • Options
    • A. infinite output impedance
    • B. zero input impedance
    • C. infinite bandwidth
    • D. All of the above
      • Discuss
    • 6. How many logic states does an S-R flip-flop have?

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
      • Discuss
    • 7. Op-amps used as high- and low-pass filter circuits employ which configuration?

    • Options
    • A. noninverting
    • B. comparator
    • C. open-loop
    • D. inverting
      • Discuss
    • 8. 

      What is the power in the given circuit?


    • Options
    • A. 32 W
    • B. 80 W
    • C. 500 W
    • D. 16 kW
      • Discuss
    • 9. If the resistance in a circuit with constant voltage increases, the current will

    • Options
    • A. increase
    • B. decrease
    • C. stay the same
    • D. Not enough information
      • Discuss
    • 10. 

      What is the resistor value in the given circuit?


    • Options
    • A. 200 Ω
    • B. 1 kΩ
    • C. 2 kΩ
    • D. 4 kΩ
      • Discuss

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