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Circuit Diagram Apparatus Power supply To provide the power (in 3-12 volts) Variable Resistor To adjust the current to get the most suitable values Filament bulb To investigate the resistance variation in a 6v, 0.06A bulb Ammeter To measure the current through the bulb (up to 10A, 2 decimal places) 6 Connecting wires To connect the circuit Voltmeter To measure the voltage across the bulb (up to 20V, 2 decimal places) Safety * Don't have a current to large as it can damage the equipment * Avoid a short circuit * Switch apparatus off if it becomes too hot * Don't go near electrical equipment with wet hands * Be careful with equipment Fair Test To keep this experiment a fair test I will use the same apparatus and the same bulb, because results may differ with other equipment, so by using the same I am avoiding anomalous results. Reliability I will do the experiment twice so I can compare the results to see if the trends are the same and avoid...

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