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6 Written questions

5 Multiple choice questions

  1. An electrical circuit where the current has only one path. If the path is interrupted in any point, it stops current flow in the entire circuit.
  2. A material that allows electrons to move easily through it.
  3. The force exerted by a machine to overcome resistance to gravity or friction
  4. A material that does not allow heat or electrons to move through it easily.
  5. States that potential difference=current X resistance, or V (volts)=I (amperes) X R (ohms).

5 True/False questions

  1. potential differenceThe rate at which electrical energy is converted to another form of energy; this is expressed in watts (W) or kilowatts (kW).


  2. electric fieldAn area surrounding an electron that exerts a force on anything nearby with an electric charge; is strongest nearest the electron and weakens with a distance.


  3. electroscopeA device containing two suspended metal leaves in a jar that move apart when charged; used to detect the presence of electric charges.


  4. currentA closed path through which electrons flow.


  5. kilowatt-hourThe unit of electrical energy