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  • Question

  • The time required for one weber of flux to cut a conductor and produce one volt is:


  • Options
  • A. one revolution
  • B. one second
  • C. one millisecond
  • D. four revolutions

  • Correct Answer
  • one second 

    • Inductors problems

    Search Results

    • 1. The time difference, or lag, between flux density and magnetizing force is known as:

    • Options
    • A. eddy current
    • B. magnetic saturation
    • C. hysteresis
    • D. coercivity
      • Discuss
    • 2. The unit of flux density is:

    • Options
    • A. magnetomotive force
    • B. a weber
    • C. a maxwell
    • D. a tesla
      • Discuss
    • 3. A transformer is used:

    • Options
    • A. to couple electric energy from one dc circuit to another
    • B. to couple electric energy from an ac circuit to a dc circuit
    • C. to couple electric energy from a dc circuit to an ac circuit
    • D. to couple electric energy from one ac circuit to another
      • Discuss
    • 4. Faraday's law states that the:

    • Options
    • A. direction of the induced voltage produces an opposition
    • B. direction of an induced current produces an aiding effect
    • C. emf depends on the rate of cutting flux
    • D. emf is related to the direction of the current
      • Discuss
    • 5. Find VR and VL.


    • Options
    • A. VR = 41.6 V, VL = 78.4 V
    • B. VR = 48 V, VL = 110 V
    • C. VR = 56 V, VL = 106 V
    • D. VR = 60 V, VL = 60 V
      • Discuss
    • 6. If the primary of a 4:1 turns transformer dissipates 5 W, what is the secondary power?

    • Options
    • A. 5.0 W
    • B. 1.25 pW
    • C. 9.5 W
    • D. 20.0 mW
      • Discuss
    • 7. A change of one ampere per second in an inductor that induces a voltage of one volt is considered as which unit value?

    • Options
    • A. a lenz
    • B. an ohm
    • C. a farad
    • D. a henry
      • Discuss
    • 8. What is electromagnetism?

    • Options
    • A. the magnetic field generated around a conductor when a current passes through it
    • B. the magnetic field generated in a conductor by an external voltage
    • C. the voltage caused by a magnetic field in a conductor
    • D. the current generated by an external magnetic field
      • Discuss
    • 9. What is the total inductance of a 5 H and a 100 mH coil connected in parallel?

    • Options
    • A. 4.76 mH
    • B. 33.3 mH
    • C. 98.0 mH
    • D. 150.0 mH
      • Discuss
    • 10. What does Faraday's law concern?

    • Options
    • A. a magnetic field in a coil
    • B. a magnetic field cutting a conductor
    • C. a magnetic field hystersis
    • D. a magnetic field in a conductor
      • Discuss

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