current, potential difference and resistance

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    Created by
    Harrison Wickens

    Cards (8)

    • what is an electric current
      the flow of electric charge
    • what is the equation linking charge, current and time
      charge= current x time
    • what two factors does the current in a circuit rely on
      potential difference and resistance
    • how do you calculate potential difference
      potential difference= current x resistance
    • what is an ohmic conductor
      a conductor where the current and potential difference are directly proportional
    • name 2 components for which resistance is not constant as current changes
      lamps and diodes
    • what happens to the resistance of the filament lamp as temp increases
      resistance increases due to ions in the metal having more energy
    • what happens to the resistance of a thermistor as temp increases
      it decreases
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