In series

• 1. First you'll need to find at least 4 identical resistors
• 2. Then build the circuit shown below using 1 of the resistors. Make a note of the potnetial difference of the battery (V)

  
• 3. Measure the current through the circuit using the ammeter. Use this to calculate the resistance of the circuit using R = V / I

  
• 4. Add another resistor, in series with the first

  
• 5. Again, measure the current through the circuit and use this and the potential difference of the battery to calculate the overall resistance of the circuit

  
• 6. Repeat steps 4 and 5 until you've added all of your resistors
• 7. Plot a graph of the number of resistors against the total resistance of the circuit