To find out how the resistance of a wire changes depending on its thickness.

... Physics AT1 Kobir Ali Aim; To find out how the resistance of a wire changes depending on its thickness. Preliminary Work Current (A) Voltage (V) Resistance (?) 0.04 0.56 14 0.05 0.59 11.6 0.05 0.66 13.2 0.06 0.72 12 0.07 0.9 12.86 0.08 0.99 12.37 0.11 1.26 11.45 0.14 1.69 12.07 0.18 2.14 11.89 0.24 2.75 11.46 Theory Electric conductors are materials that can carry an electric current. The best conductors are metals, because in these the electrons can move freely through the material, carrying the current. In this experiment the conductor is going to be a metal wire. As the electrons move, they strike the atoms and make them vibrate; this interferes with the current flow and causes the materials to heat up (kinetic energy). This is electrical resistance. Good conductors have low resistance (e.g. copper). Electrical resistance measures how difficult it is for an electrical current to flow through a material. We can think of current being carried by electrons; if they were completely free to flow along, there would be no electrical resistance. However, the electrons collide with each other and with the

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