The resistance of a wire.

... Planning Variables Length of wire: The length of a wire will affect the resistance because wires have a net of atoms and the electric current has to pass through this net. Every time a charged atom hits the net it loses some of its charge, therefore the longer the wire the larger the chance of the charged electrons colliding with the net and losing some of their charge therefore increasing the resistance. Width of wire: The width of a wire will affect the resistance because the wider a wire the more space in the net for the charged electrons to get through without colliding with the net and therefore decreasing the resistance. It is like letting a lot of water out of a small hole; it would go slowly, whereas with a bigger hole it flows out faster. Temperature of wire: The temperature of the wire would affect the resistance because as the wire gets hotter the

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