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Home ‣ Electrical Engineering ‣ Magnetism and Electromagnetism Comments
  • Question

  • The tesla is the unit of magnetic flux.


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  • A. True
  • B. False

  • Correct Answer
  • False 

    • Magnetism and Electromagnetism problems

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    • 1. Ampere-turn is the unit of magnetomotive force (mmf).

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    • A. True
    • B. False
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    • 2. If a conductor is moved back and forth at a constant rate in a constant magnetic field, the voltage in the conductor will reverse polarity.

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    • A. True
    • B. False
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    • 3. A relay is an electromagnetically controlled mechanical device in which electrical contacts are opened or closed by a magnetizing current.

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    • A. True
    • B. False
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    • 4. The Thevenin equivalent voltage (VTH) is the short-circuit voltage between two terminals in a circuit.

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    • A. True
    • B. False
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    • 5. A practical current source has a finite internal resistance.

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    • A. True
    • B. False
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    • 6. Materials with a low retentivity do not retain a magnetic field very well.

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    • A. True
    • B. False
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    • 7. Hysteresis is the number of lines of force per unit area in a magnetic field.

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    • A. True
    • B. False
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    • 8. Lenz's law defines the polarity of the induced voltage.

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    • A. True
    • B. False
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    • 9. A magnetic field is made up of flux lines.

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    • A. True
    • B. False
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    • 10. Reluctance in a magnetic circuit is analogous to current in an electrical circuit.

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    • A. True
    • B. False
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