Science investigation: I am going to investigate factors, which affect the resistance of a wire. Prediction I predict that the larger the length of wire the bigger the resistance will be. I think this because I found out that if the length increases then the resistance will also increase in proportion to the length. I thought this was because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms. So if the length is doubled the number of atoms will also double resulting in twice the number of collisions slowing the electrons down and increasing the resistance. What causes resistance? The current is a flow of tiny, negatively charged electrons through a conductor (the wire). Electrons are much smaller than atoms. Metals are particularly good at carrying a current, because they have lots of "free" electrons. This means electrons, which are not bound onto a particular atom in the wire, and will move through the wire if you apply a voltage across its ends. So the current is the electrons moving through the wire. The big heav......

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