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  • Question

  • If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?


  • Options
  • A. 6240 ohms
  • B. 2.4 kilohms
  • C. 410 ohms
  • D. 0.62 kilohms

  • Correct Answer
  • 6240 ohms 

    • More questions

    • 1. A single-phase induction motor

    • Options
    • A. is self-starting
    • B. operates at a fixed speed
    • C. is less reliable than a three-phase synchronous motor
    • D. none of the above
      • Discuss
    • 2. Series resonance happens when _____.

    • Options
    • A. XC = XC
    • B. XL = XC
    • C. XL = XB
    • D. XT = R
      • Discuss
    • 3. In this analog amplifier the input is in phase with the output.


    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The double-inversion rule states that if a variable is inverted twice, then the variable will be back to its original state.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. A triangular-wave oscillator can consist of an op-amp comparator, followed by a(n)

    • Options
    • A. differentiator
    • B. amplifier
    • C. integrator
    • D. multivibrator
      • Discuss
    • 6. The number of joules used in 1 second is always equal to the number of _______.

    • Options
    • A. siemens
    • B. coulombs
    • C. amperes
    • D. watts
      • Discuss
    • 7. A virtual ground is a(n) ______ ground because this point is at zero volts.

    • Options
    • A. ordinary
    • B. voltage
    • C. chassis
    • D. earth
      • Discuss
    • 8. The basic instrumentation amplifier has ________ input(s).

    • Options
    • A. 1
    • B. 2
    • C. capacitive
    • D. resistive
      • Discuss
    • 9. What is the total current?


    • Options
    • A. 15.6 mA
    • B. 17.8 mA
    • C. 21.9 mA
    • D. 26.0 mA
      • Discuss
    • 10. This circuit is a low-pass filter.


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

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