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`Resistance of a wire Aim: To see how the length of a wire affects its resistance. I'm going to test 4 different types of wire in another experiment and use the one with the highest resistance. The Theory behind the Experiment Theoretically the length of a wire should affect its resistance. Electricity encounters a certain amount of obstruction when passing through a wire depending on its length, width, temperature and type of metal, this obstruction is called the resistance and is measured in ohms. The longer and thinner the wire the harder it is for the electrons to flow through, because there are less spaces for it to flow through and more obstructions along the length. Therefore the longer the wire is the more resistance there should be. The other factor that can affect the resistance is the metal type, for example the resistance of an Iron wire is about seven times greater than that...

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