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  • Question

  • An air-core inductor has a metal core.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 

    • Inductors problems

    Search Results

    • 1. 

      The total inductance in the given circuit is 0.6 mH.


    • Options
    • A. True
    • B. False
      • Discuss
    • 2. The primary winding of a transformer is the side connected to the load.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. The current through an inductor in a parallel RL circuit leads the current through the resistor.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. A transformer can be designed to step up or step down dc voltage.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. The amount of dc current that an inductor will allow to pass depends on the circuit's total resistance that is in series with it.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The ___ of a coil is the inherent resistance of the wire.

    • Options
    • A. ac resistance
    • B. reactance
    • C. winding resistance
    • D. permeability
      • Discuss
    • 7. The ___ cannot change instantaneously in an inductor.

    • Options
    • A. voltage
    • B. current
    • C. power
    • D. magnetic field
      • Discuss
    • 8. 

      The inductance value of L3 in the given figure is _____ if the total inductance is 340 mH.


    • Options
    • A. 150 mH
    • B. 220 mH
    • C. 295 mH
    • D. 315 mH
      • Discuss
    • 9. 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
    • 10. Inductive ___ represents the opposition to an alternating current.

    • Options
    • A. impedance
    • B. resistance
    • C. reluctance
    • D. reactance
      • Discuss

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