Resistance of a wire.

... Resistance of A Wire Theory and Background Write Up Wires have resistance because they have thousands of atoms inside them. When voltage flows through a wire the electrons hit these thousands of atoms. This slows down the electrons. This slowing down process is what we call resistance. The electrons always travel from negative to positive on diagrams, although in conventional current it actually flows in the other direction. Figure 1 - Inside of a Wire _ + The resistance of a wire can be altered depending on the following: - * The material of a wire - This can be because some wires have more atoms inside them than others do. * The temperature of the wire - If there is a high temperature in the wire then the atoms will vibrate more. This means that electrons are more likely to "hit" the atoms. * The cross-sectional area of the wire - When the cross-sectional area

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