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Factors affecting the resistance of a wire
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| Submitted: Sun Dec 15 2002
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RESISTANCE OF A WIRE INVESTIGATION Skill Area P; Planning Experimental Procedure Hypothesis Four factors affecting the resistance of a wire are: · The temperature of the wire. If the wire is hotter than usual then electrons are given more energy and collision is more frequent. Therefore the resistance is greater. · The length of the wire. The length of the wire is directly proportional to the resistance and so if the length of the wire is longer, then the resistance of the wire is greater. · The width of the wire. Thick wires have more free electrons per unit cross-sectional area than thin wires. Therefore thicker wires will have a larger resistance than thinner wires · The metal that the wire is made out of. Some metals conduct heat easier and quicker than others. All metals are good conductors because there are lots of free electrons to move between the atoms of the metal. Prediction If the length of...
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