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Home ‣ Electrical Engineering ‣ Magnetism and Electromagnetism Comments
  • Question

  • Lenz's law defines the polarity of the induced voltage.


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  • A. True
  • B. False

  • Correct Answer
  • True 

    • Magnetism and Electromagnetism problems

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    • 1. 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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    • 2. 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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    • 3. The tesla is the unit of magnetic flux.

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    • A. True
    • B. False
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    • 4. Ampere-turn is the unit of magnetomotive force (mmf).

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

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    • A. True
    • B. False
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    • 7. 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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    • 8. Electromagnetic induction is the force that produces a magnetic field.

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    • A. True
    • B. False
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    • 9. Voltage leads current by 90° in a capacitor.

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    • A. True
    • B. False
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    • 10. The dielectric constant is the ability of a material to establish an electric field.

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    • A. True
    • B. False
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