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6 Written questions

5 Multiple choice questions

  1. The force exerted by a machine to overcome resistance to gravity or friction
  2. The rate at which electrical energy is converted to another form of energy; this is expressed in watts (W) or kilowatts (kW).
  3. A device containing two suspended metal leaves in a jar that move apart when charged; used to detect the presence of electric charges.
  4. A power of source that acts as an electron pump and generates electric current by a chemical reaction
  5. A material that does not allow heat or electrons to move through it easily.

5 True/False questions

  1. series circuitAn electrical circuit where the current flows through more than one path. If one path is interrupted, current will still flow through the other paths.

          

  2. potential differenceThe difference in electric potential energy between two different points; measured in volts (V).

          

  3. circuitA closed path through which electrons flow.

          

  4. kilowatt-hourA material that does not allow heat or electrons to move through it easily.

          

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