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of 16 available terms

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6 Written Questions

5 Multiple Choice Questions

  1. A device containing two suspended metal leaves in a jar that move apart when charged; used to detect the presence of electric charges.
  2. A closed path through which electrons flow.
  3. An 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.
  4. The unit of electrical energy
  5. A material that allows electrons to move easily through it.

5 True/False Questions

  1. insulatorA material that does not allow heat or electrons to move through it easily.


  2. parallel circuitAn 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.


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


  4. ohm's lawStates that potential difference=current X resistance, or V (volts)=I (amperes) X R (ohms).


  5. dry cellA power of source that acts as an electron pump and generates electric current by a chemical reaction


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