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Physics Coursework Resistance of Wire Lengths Aim: To aim of this experiment is to find out how different lengths of wire can change the resistance. Introduction: A piece of wire will be just over 100cm long and the distance of it will keep changing so that the resistance for different lengths can be recorded. A voltmeter and an ammeter will be used so that the resistance can be worked out. A rheostat will be used and the results will be repeated at three different places in the rheostat. A manganin wire will be used it is 30 standard wire gauge. Preliminary Work: The ammeter and voltmeter showed that it is quite hard to get exact readings so an estimate was made within the group for a reasonable answer to what it was closest to, which may have varied the results. At first the connections were the wrong way around, for example, instead of going from positive to...

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