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  • Question
  • 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

  • Correct Answer
  • a magnetic field cutting a conductor 


  • Inductors problems


    Search Results


    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • Discuss
    • 6. Providing a constant output regardless of ac input or load resistance changes is the function of a:

    • Options
    • A. transformer
    • B. filter
    • C. regulator
    • D. rectifier
    • Discuss
    • 7. What is wrong with this diode?


    • Options
    • A. open
    • B. short
    • C. nothing
    • D. not enough data
    • Discuss
    • 8. Electrons in the outermost orbit or shell of an atom are called

    • Options
    • A. free electrons
    • B. negative ions
    • C. valence electrons
    • D. conduction band electrons
    • Discuss
    • 9. Rectifier output polarity depends upon:

    • Options
    • A. cycles of input
    • B. capacitor polarity
    • C. half or full wave
    • D. diode installation
    • Discuss
    • 10. What is the current through the zener diode?


    • Options
    • A. 0 mA
    • B. 7 mA
    • C. 8.3 mA
    • D. 13 mA
    • Discuss


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