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How does the length affect the resistance of a wire? Aim: To see how the length of a piece of wire will affect the resistance. Prediction: As the length of the wire increases the resistance will increase, because the Voltage will be going up, the current will be going down, causing the resistance to increase. Hypothesis: I think that as the length of the wire goes up the resistance will increase because there is more wire for the current to pass through, making the current decrease and the resistance increase. Preliminary Research: Power Voltage = 3 Wire Thickness = 32swg Length of wire Voltage Current Resistance 10 0.76 1.15 0.66 20 1.13 0.87 1.29 30 1.32 0.7 1.88 40 1.45 0.56 2.58 50 1.54 0.46 3.34 As the preliminary research clearly shows, as the length of the wire increases the voltage also increases but the current decreases, causing the resistance to increase as: Resistance = Voltage/Current Apparatus: * Voltmeter - To measure the voltage, or potential difference across 2 points, in this case, the two ends of the wire. * Ammeter - To measure the...

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