... atoms increasing the chance of a collision and slowing the electrons down. Also as the thickness of wire increases the resistance will decrease, as there will be more electrons so the chance of an electron not colliding increases. This is what the preliminary work seemed to show. Plan * Set the apparatus up as show above. The masking tape hold the wire as taut as possible, so the wire does not have kinks or bends which make the wire appear shorter than it actually is. * Connect two probes to a multi-metre and set it to measure ohms (the unit of resistance). * First hold the probes together to measure the resistance in them this number can be subtracted from the results to leave the actual resistance of the wire. * Place the first probe firmly on the 0cm mark of the metre rule. Place the second probe on every 10cm interval to the ...

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