Trivia: Quiz On Electricity And Magnetism!

18 Questions | Total Attempts: 785

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Trivia: Quiz On Electricity And Magnetism!

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Questions and Answers
  • 1. 
    A measure of a material's ability to retain magnetism.
    • A. 

      Flux Density

    • B. 

      Coercive Force

    • C. 

      Flux Lines

  • 2. 
    Magnetic strength is measured in flux density.
    • A. 

      True

    • B. 

      False

  • 3. 
    Reluctance
    • A. 

      Is resistance to magnetism.

    • B. 

      Is a variable resistor used as a voltage divider.

    • C. 

      Is a measure of a materials ability to become magnetized.

  • 4. 
    Occurs when all the molecules of the magnetic materials are lined up
    • A. 

      Ampere-Turns

    • B. 

      Reluctance

    • C. 

      Saturation

  • 5. 
    Ampere-Turns are determined by multiplying the number of turns of wire by the current flow.
    • A. 

      True

    • B. 

      False

  • 6. 
     The amount of magnetism left in a material after the magnetizing force has stopped.
    • A. 

      Residual Magnetism

    • B. 

      Potentiometer

    • C. 

      Saturation

  • 7. 
    Permeability is a measure of a materials ability to become demagnetized
    • A. 

      True

    • B. 

      False

  • 8. 
    Flux Lines
    • A. 

      Magnetic lines of force are called flux

    • B. 

      Magnetic lines of flux repel each other and never cross

    • C. 

      They do not flow but are always assumed to be in the North and South directions

    • D. 

      All the above

  • 9. 
    Natural Magnetic is called
    • A. 

      Lodestones

    • B. 

      Loading stones

    • C. 

      Leading stones

    • D. 

      All the above

  • 10. 
    Resistors:
    • A. 

      Limit the flow of current in a circuit and are voltage dividers

    • B. 

      Are voltage dividers and have high power ratings

    • C. 

      Have higher power ratings and limit current flow

    • D. 

      All the above

  • 11. 
     Have higher power ratings, should be mounted vertically.
    • A. 

      Metal film resistors

    • B. 

      Carbon film resistors

    • C. 

      Wire-wound Resistors

  • 12. 
    A potentiometer is a variable resistor used as a voltage divider.
    • A. 

      True

    • B. 

      False

  • 13. 
    Metal Film Resistor:
    • A. 

      Have a higher tolerance

    • B. 

      Must be mounted vertically

    • C. 

      Don’t change value with age

    • D. 

      All the above

  • 14. 
    Demagnetizing occurs by:        
    • A. 

      Being struck

    • B. 

      Holding another magnetic close

    • C. 

      Cooling

    • D. 

      An AC unit with a power connection

    • E. 

      Heating

    • F. 

      Smashing with a sledge-hammer

    • G. 

      A strong electromagnetic connected to an AC line

  • 15. 
    Left-handed Rule if the direction of current flow is reversed, the polarity of the magnetic field is not reversed.
    • A. 

      True

    • B. 

      False

  • 16. 
    Energy is required to create a magnetic field, but no energy is required to maintain a magnetic field.
    • A. 

      Permanent Magnetics

    • B. 

      Residual Magnetism

  • 17. 
    Magnetic Materials:
    • A. 

      Ferromagnetic Materials – easily magnetized

    • B. 

      Paramagnetic Materials – can be magnetized but not as easily.

    • C. 

      Diamagnetic Materials – cannot be magnetized.

    • D. 

      All the above

  • 18. 
    Basic Law of Magnetism unlike poles _______ and like poles ________.
    • A. 

      Repel and Attract

    • B. 

      Repel and Repel

    • C. 

      Attract and Repel

    • D. 

      Attract and Attract