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I am going to investigate what the resistivity is of a pencil lead. Pencil lead is made from a combination of finely ground graphite and clay, mixed with water and pressed together at high temperatures into thin rods
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Finding Out The Resistivity Of Pencil Lead Plan Hypothesis I am going to investigate what the resistivity is of a pencil lead. Pencil lead is made from a combination of finely ground graphite and clay, mixed with water and pressed together at high temperatures into thin rods. Graphite is largely made up of carbon, which is quite a good conductor of electricity, but clay is not. This means the more clay that is mixed within the pencil lead the higher the resistance will be. The resistivity of a material is an individual property. It does not depend on the dimensions of the component only the materials from which it is made. To do this I will first have to find the resistance of the pencil lead. For the resistance I expect the graph to look something like this: The reason I predict the graph to look like this is because I think, and assume,...
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