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How length of a wire affects resistance.
Member rating: No Rating | Words: | Submitted: Tue Oct 12 2004
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How length of a wire affects resistance. Background knowledge. The atoms in metals don't move, they can only move to and fro about a fixed point. This means the electrons in a piece of wire struggle to squeeze through the atoms. It is harder for them to get through a longer wire as it has more atoms. This means the resistance is higher in a piece of wire, as I will prove in my experiment. Copper ions are held together by the attractions to the electrons, this is because they are positively charged. Molecules or covalent substances have no more free electrons and therefore don't conduct, they don't have any charged particles so they are unable to conduct. So these substances won't work in the experiment. I will be using a metallic piece of wire, as metals are good conductors of heat and electricity because the free electrons can...
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