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Factors that affect the resistance of a wire. Preliminary Work. At the beginning of the year we carried out two investigations entitled "To investigate the relationship between P.D and current in a metal resistor," and "To investigate whether the resistance of a lightbulb filament changes as it heats up." We carried out the experiment and then produced separate graphs for the investigations. From the results I obtained from the 1st experiment I plotted a graph (which was a straight line) and then calculated the resistance. Resistance/Gradient = difference on y axis difference on x axis Resistance = 8 = 15? 0.55 From 2nd experiment I also plotted a graph, for this one it was a curve showing that the resistance was changing continuously due to the wire getting hotter as the current was on for a long time. There are many factors that affect the resistance of a wire. They include;-> Length of the wire> Thickness...

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