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How Does the Length of the Wire Affect the Resistance?
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| Submitted: Thu Jul 11 2002
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JOHN PEART HOW DOES THE LENGTH OF THE WIRE AFFECT THE RESISTANCE? PLANNING I am going to conduct an experiment to test the resistance of piece of constantan wire. The main factors that affect the resistance in a conductor are: * Length * Temperature * Cross sectional area * Material magnetism The factor that I am going to change is the length. Method I am going to carry out the investigation on a 1metre piece of constantan wire. I am using constantan wire because its resistance is not affected by temperature so I will not have to maintain a steady air temperature. I will set up the equipment listed below. The equipment I will need for this experiment is as follows: Power pack Voltmeter Ammeter Bulb Crocodile clips X2 Wires 1 Metre of Constantan wire Metre ruler To begin with I will check that the voltmeter and ammeter both read zero when they are disconnected. This is to ensure that the equipment is working correctly and ensure a...
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