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An investigation into the factors affecting the resistance of a wire.

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An investigation into the factors affecting the resistance of a wire. Introduction: This experiment aims to look at the resistance of a wire (Constantan swg32) within a circuit, and the factors affecting it. Involved in the experiment will be variables, which will be taken into account, as they will affect the range of results. Prediction: Resistance affects the flow of current within a wire by opposing the flow of electrons. ...read more.


The law states that: The electric current flowing through a metallic conductor is directly proportional to the potential difference between its ends, as long as the temperature stays the same. As quoted on Encarta (Multimedia CD) The unit of resistance is the Ohm, the amount of resistance that limits the passage of one ampere when one volt is applied to it. ...read more.


From the information gathered I am now able to predict the likely outcome of resistance of the wire when both the wire is decreased in size and the cross-sectional area is increased. As the size of the wire is decreased so is the resistance as less current is passing through the wire, therefore the resistance will be lower because of less opposing electrons in the wire. Also, when the cross-sectional area of the wire is increased the resistivity of the wire will also decrease therefore the resistance is low. ...read more.

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