atoms is high so the number of free electrons is also high. However if the atoms in the wire are dense with little free electrons, then this will cause an increase in resistance, due to frequent collisions with the nuclei.
             · Finally, the length of the wire is a factor. The longer the wire, the longer it will take electrons to get to the end of the wire. This is because there will be more collisions between electrons and nuclei. So, in theory, the length of the wire should be directly proportional to the resistance. This is because electrical resistance may be thought of as an interference with the free flow of electrons. If the wire were a superconductor, there would be no obstacles to this flow and resistance would be zero, regardless of the length. But there are impediments and the longer the wire; the more of these are encountered.
             One obstacle to the free flow of electrons is the lattice of the atomic nuclei that make up the metal. Another factor is impurities in the metal, which have a higher resistance than the pure metal. If you double the length of the wire you have twice as many of these obstacles to overcome.
             Things we can use to ensure the accuracy of the results of the experiment are:
             · Accurate multi-meters so that you get accurate results and not too many anomalies
             · Accurate metre rule so that you get accurate lengths of wire
             · Appropriate power source such as a power pack to get the right voltage
             I plan to take 15 sets of results for each trial over a range of 15 – 75cm at 15 cm gaps. I will need to repeat the experiment three times which means I will get 30 readings. I will do this to make a fair test and to make it more accurate I will take the average of the results to get a single answer.
             With regards to scientific knowledge I already know that that Volts = Current x Resistance (V = I x R)
             I know how to measure Current and Voltage with a digital meter and how...