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Find out what effect changing the length and thickness of wire has on resistance.
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Resistance coursework Aim: The aim of the investigation is to find out what effect changing the length and thickness of wire has on resistance. Introduction: Resistance is any obstacle in a circuit that prevents or slows down the flow of electrons. Resistance is measured in ohms (?) and the symbol is R. Electricity is conducted through a wire, by free electrons. The number of free electrons depends on the material. The higher the number of free electrons, the better the wire is at conducting electricity and therefore it has less resistance. The free electrons are given energy and as a result move and collide with neighbouring free electrons. When the electrons collide, they lose energy and create heat, which then results in the wire heating up. Resistance has an inversely proportional relationship with current. The resistance of a length of wire is calculated by using the ohms law. This is done by measuring...
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