Electricity

40 Questions

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Electricity Quizzes & Trivia

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Questions and Answers
  • 1. 
    Concerning the flow of electricity, materials such as rubber, glass, and dry wood are known as
    • A. 

      Conductors

    • B. 

      Insulators

    • C. 

      Thermocouples

    • D. 

      D electric cells

  • 2. 
    Dry wood makes a good conductor.
    • A. 

      True

    • B. 

      False

  • 3. 
    A ______ is the fundamental unit of a battery.
    • A. 

      Watt

    • B. 

      Thermocouple

    • C. 

      Cell

    • D. 

      None of the above answers are correct.

  • 4. 
    Ohm's law maybe expressed as an equation I=E/R, where "E" represents:
    • A. 

      Resistance in ohms.

    • B. 

      Voltage in volts

    • C. 

      Current in amperes.

    • D. 

      None of the answers are correct.

  • 5. 
    Ohm's law may be expressed as an equation I=E/R, where "R" represents:
    • A. 

      Resistance in ohms.

    • B. 

      Voltage in volts.

    • C. 

      Current in amperes.

    • D. 

      None of the answers are correct.

  • 6. 
    When voltage is doubled, power is
    • A. 

      Tripled

    • B. 

      Halved

    • C. 

      Doubled

    • D. 

      Doubled twice

  • 7. 
    The study of electricity began with the ancient___________
    • A. 

      Egyptians

    • B. 

      Jews

    • C. 

      Greeks

    • D. 

      Europeans

  • 8. 
    Charged atoms are called_________
    • A. 

      Ohms

    • B. 

      Conductors

    • C. 

      Photoelectrons

    • D. 

      Ions

  • 9. 
    The flow of electrical energy through a conductor is called
    • A. 

      an electric charge

    • B. 

      Electric current, or electricity.

    • C. 

      a negative charge.

    • D. 

      a unit of conductance.

  • 10. 
    Material that permits the free movement of a large number of electrons, such as copper wire, is known as a good
    • A. 

      Conductor of electricity.

    • B. 

      Insulator of electricity.

    • C. 

      Example of electrolytic action.

    • D. 

      Electromotive force.

  • 11. 
    N order, the best conductors of electricity are
    • A. 

      copper, aluminum, and silver wire.

    • B. 

      aluminum, copper and silver wire.

    • C. 

      Copper, silver, and aluminum wire.

    • D. 

      Silver, copper, and aluminum wire.

  • 12. 
    Electromotive force may be produced by
    • A. 

      Friction and pressure.

    • B. 

      Heat and light

    • C. 

      Chemical action and magnetism.

    • D. 

      All of the answers are correct.

  • 13. 
    The true cause of electricity was found with the development of
    • A. 

      Charged particles.

    • B. 

      Atomic theory of matter.

    • C. 

      Static electricity.

    • D. 

      Protons

  • 14. 
    A substance that has few free electrons is called
    • A. 

      Ionic.

    • B. 

      An insulator.

    • C. 

      A conductor.

    • D. 

      Electron deficient

  • 15. 
    A common name for the voltage produced by rubbing two materials together is
    • A. 

      Static electricity.

    • B. 

      Friction.

    • C. 

      Dynamic charge

    • D. 

      Dry charge. Dry charge.

  • 16. 
    Wires in an electric circuit are designed to keep
    • A. 

      electrical resistance high.

    • B. 

      Electrical current low.

    • C. 

      electrical resistance low.

    • D. 

      Distance from source voltage to load as far as possible.

  • 17. 
    A significant feature of a battery composed of secondary cells such as an automobile battery is that it is
    • A. 

      cheap.

    • B. 

      Light

    • C. 

      Rechargeable

    • D. 

      None of the answers are correct.

  • 18. 
    The direction of electron movement in any conductor is
    • A. 

      From negative potential to positive potential.

    • B. 

      From positive potential to negative potential.

    • C. 

      between like charges.

    • D. 

      in orbit around their nuclei.

  • 19. 
    Which of the following kinds of waves can be felt by human beings?
    • A. 

      Vibrations

    • B. 

      Radio

    • C. 

      Radar

    • D. 

      Light

  • 20. 
    The ___________ is the length of a cycle expressed in distance units.
    • A. 

      Frequency

    • B. 

      Amplitude

    • C. 

      Wave length

    • D. 

      Cycle

  • 21. 
    The __________ is the number of cycles repeated during one second of time.
    • A. 

      Frequency

    • B. 

      Amplitude

    • C. 

      Speed

    • D. 

      Cycle

  • 22. 
    The __________ is the wave strength at particular points along the wave.
    • A. 

      Frequency

    • B. 

      Amplitude

    • C. 

      Wave length

    • D. 

      Cycle

  • 23. 
    ________occurs when there is a change in the density or atmosphere in which the wave is 
    • A. 

      Trapping

    • B. 

      Diffraction

    • C. 

      Refraction

    • D. 

      Reflection

  • 24. 
     _________ causes the spreading of radio waves behind obstructions.
    • A. 

      Trapping

    • B. 

      Diffraction

    • C. 

      Refraction

    • D. 

      Reflection

  • 25. 
     _________ causes the spreading of radio waves behind obstructions.
    • A. 

      Trapping

    • B. 

      Diffraction

    • C. 

      Refraction

    • D. 

      Reflection

  • 26. 
    ______ occurs when a temperature inversion in the atmosphere holds cold air close to the Earth's surface.
    • A. 

      Trapping

    • B. 

      Diffraction

    • C. 

      Refraction

    • D. 

      Reflection

  • 27. 
    The following are all Navy radar general categories except:
    • A. 

      Search

    • B. 

      Rescue

    • C. 

      Fire Control

    • D. 

      Special

  • 28. 
    The information gathered by most shipboard radar is presented and analyzed in a shipboard space called the
    • A. 

      Combat Information Center.

    • B. 

      All Weather Decoding Center.

    • C. 

      Radar Decoding Center.

    • D. 

      Satellite Decoding Center.

  • 29. 
    Radar can be used to track both friendly and potentially threatening
    • A. 

      satellites.

    • B. 

      Aircraft

    • C. 

      Ships

    • D. 

      None of the answers above

  • 30. 
    Radio waves are ______ from the ionosphere, which is generally 30-250 miles above the Earth.
    • A. 

      Deflected

    • B. 

      Reflected

    • C. 

      Diffracted

    • D. 

      Trapped

  • 31. 
    What is the basic continuous wave of a modulated wave called?
    • A. 

      Carrier Wave

    • B. 

      Undercurrent wave

    • C. 

      Sound waves

    • D. 

      Radar wave

  • 32. 
    What is one complete sequence of the strength of a wave as it passes through a point in space?
    • A. 

      Cycle

    • B. 

      Wavelength

    • C. 

      Frequency

    • D. 

      Aptitude

  • 33. 
    Electronics is the basic study of _______________.
    • A. 

      Electromagnetic waves

    • B. 

      Space

    • C. 

      Computer systems

    • D. 

      circuitry

  • 34. 
    The term RADAR stands for __________________.
    • A. 

      Radio detection and ranging

    • B. 

      Radio

    • C. 

      Radio ranging

    • D. 

      Radio detection

  • 35. 
    Frequency modulation is abbreviated as _______________.
    • A. 

      FM

    • B. 

      FMOD

    • C. 

      AM

    • D. 

      FR

  • 36. 
    Amplitude modulation is abbreviated as __________
    • A. 

      PM

    • B. 

      AM

    • C. 

      DW

    • D. 

      FR

  • 37. 
     _____________ uses highly sophisticated electronics to counter enemy electromagnetic waves.
    • A. 

      Electronic Warfare

    • B. 

      Anti Submarine Warfare

    • C. 

      Electronics

    • D. 

      Electricity

  • 38. 
    What type of waves can travel through a complete vacuum?
    • A. 

      Sound

    • B. 

      Vibrations

    • C. 

      Water Waves

    • D. 

      Electromagnetic Waves

  • 39. 
    What does every electronic device use for basic operation?
    • A. 

      Mechanical waves

    • B. 

      Electromagnetic waves

    • C. 

      Radar Waves

    • D. 

      Light waves

  • 40. 
    How is frequency (Hertz) abbreviated?
    • A. 

      Ht

    • B. 

      Hz

    • C. 

      HR

    • D. 

      HRZ