investigating resistance

Cards (11)

  • build a series circuit including one battery, resistor and ammeter
  • make note of the potential difference and record the current, use V=IR to calculate resistance
  • add another resistor in series and again measure current and use potential difference of battery to get resistance
  • repeat this until youve used atleast 4 resistors
  • plot a graph and u should find that the more resistors you add to series, resistance increases
  • using the same equipment, build the same initial circuit
  • measure total current and calculate resistance
  • this time add another resistor but in parallel
  • again measure current and calculate resistance
  • repeat again until youve put atleast 4 resistors in parallel
  • plot a graph for parallel circuit and you should see that adding more resistors increasing amount of current as there are more directions which decreases resistance