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  • Question

  • Electromagnetic induction is the generation of _________ from __________.


  • Options
  • A. magnetism, electricity
  • B. electricity, electricity
  • C. electricity, magnetism
  • D. magnetism, magnetism

  • Correct Answer
  • electricity, magnetism 

    • Inductors problems

    Search Results

    • 1. 

      The inductive reactance of L2 is _____ in the given circuit.


    • Options
    • A. 3.5 kΩ
    • B. 4.4 kΩ
    • C. 16.3 kΩ
    • D. 23.3 kΩ
      • Discuss
    • 2. ___ power represents the energy dissipated at a given point in time.

    • Options
    • A. True
    • B. Reactive
    • C. Real
    • D. Instantaneous
      • Discuss
    • 3. 

      The total inductive reactance is ___ in the given circuit.


    • Options
    • A. 3.5 kΩ
    • B. 4.4 kΩ
    • C. 16.3 kΩ
    • D. 23.3 kΩ
      • Discuss
    • 4. Inductive ___ represents the opposition to an alternating current.

    • Options
    • A. impedance
    • B. resistance
    • C. reluctance
    • D. reactance
      • Discuss
    • 5. After the first time constant, a transient current has changed by _______________ %, leaving _______________ % remaining.

    • Options
    • A. 63.2, 36.8
    • B. 36.8, 63.2
    • C. 13.5, 86.5
    • D. 86.5, 13.5
      • Discuss
    • 6. The opposition to ac by an inductor is directly proportional to ___.

    • Options
    • A. resistance
    • B. reactance
    • C. frequency
    • D. voltage
      • Discuss
    • 7. When current flow tries to decrease in an inductor, the magnetic field _______________ and the voltage polarity across the inductor _______________.

    • Options
    • A. collapses, remains the same
    • B. expands, reverses
    • C. collapses, reverses
    • D. expands, remains the same
      • Discuss
    • 8. After a voltage has been applied to an inductor, the current will be ___ of its full value after 2 time constants.

    • Options
    • A. 63%
    • B. 86%
    • C. 95%
    • D. 98%
      • Discuss
    • 9. An RL integrator can act as a __________ filter and an RC differentiator can act as a __________ filter.

    • Options
    • A. high-pass, high-pass
    • B. low-pass, low-pass
    • C. high-pass, low pass
    • D. low-pass, high-pass
      • Discuss
    • 10. One of the advantages of using transformer coupling in a half-wave rectifier is that it allows the ac source to be directly connected to the load.

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

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