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Factors affecting the resistance of a wire.
Member rating: No Rating | Words: | Submitted: Wed Oct 29 2003
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Factors affecting the resistance of a wire Prediction I will investigate how different lengths of wire will affect the resistance. I believe that the longer the wire, the higher the resistance. This is because the longer the wire, the more nuclei stand in the way of electrons, restricting the space in which they have to move through. This causes the wire to heat and the current to go down. Electrons are not lost, but they take longer to get through the wire. I have sketched a graph to show my prediction. As you can see, as the length increases so does the resistance. Ohm's law shows that my theory is correct: Voltage (v) = current (A) x resistance ( ) Also shown in the diagram: "If you increase the resistance by making the wire gradually longe, then less current will flow if the voltage remains constant. If you increase the voltage then more current will...
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