1, Set up the circuit as shown in the diagram., 2, Set the voltage to 3V, 3, Start with the crocodile clip on 20cm, take the current from the meters and place in a table., 4, Switch the power supply off., 5, Move the crocodile clip up to 40cm, take the current from the meters and place in a table., 6, Switch off the power supply again, 7, Repeat step 4 for 60cm, 80cm and 100cm. Switch off the power supply after each reading., 8, Repeat the whole experiment again 2 more times (a total of 3 times) placing results in the table each time., 9, Find the average current for each reading., 10, Calculate the resistance using the equation R = V/I, 11, Draw a graph of length of wire on the x axis and resistance on the y axis.

Method Recap

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