Introduction
The resistance of a wire depends on certain factors. Some of these variables are listed below:
• Length of wire
• Diameter or thickness of wire
• Temperature at which wire is kept
• The material of which wire is made out of.
• The potential difference or voltage.
• Humidity
• Cross sectional area.
• Voltage across circuit
All these factors will have to be kept constant except the diameter of the wire whilst doing the experiment to ensure that the investigation is a fair test.
I have decided to investigate how the diameter of a wire affects its resistance because other factors such as temperature are hard to control or vary. There is not a large enough range of materials to investigate how materials affect the resistance of a wire. The way in which the diameter of a wire affects the resistance is an efficient experiment to do. A graph can be plotted easily, there is a large range of results and the results can be recorded easily.
Variables
The......
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