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How does the Length of Pencil Lead affect Its Resistance Planning: Aim: The aim of this piece of course work is to find out how does the resistance of a pencil lead changes as I increase its length. And to find out what is the relationship between the length of a pencil lead and its resistance. Safety: Safety is a very important thing to consider as we doing a scientific experiment, so is this experiment. For make sure there will not be any accident as I doing this experiment, I will do the following things. 1, I will make sure I had set up the right electrical circuit before I let the electricity run through the circuit, to prevent the short circuit. 2, I will add a switch in the circuit, so that will prevent the lead get too hot to handle and to prevent the battery wasting. 3, I will...

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