Graph Results

Using the results I collected and the graph I created I was able to see that as I increased the length the resistance increased. My graph shows that there is a positive correlation between the resistance and the length of wire. This means that as you increase the length of wire the resistance increases. My graph doesn't only show a correlation between resistance and length it also shows that they are directly proportional to each other. This means if I double one the other one will double. This pattern is shown thought my graph for example at 30cm the resistance is 0.9Ω and then when I double the length to 60cm the resistance is 1.8Ω. From the graph I would predict that at 5cm length of wire it would have a resistance of 0.15 meaning that using the line of best fit I could work out the resistance at any point on my graph. I am confident in my conclusion because my graph shows me that resistance is directly proportional to length of a wire. The readings on my graph all have a spread of 0.4 - 0.5 which shows that the results were accurate. This is not the only conclusion I can make out of this graph I can also say how . The practical was good because we used the wire which kept a constant temperature during the testing, also we collected the data very accurate we done this by working out which equipment is the best to recall results so that we could get the most accurate and clear results as we can but the practical wasn't so good because when you tested the wire at small lengths the wire was getting to hot causing the reading to have to be taken quickly so we might not have good the most accurate results on the shorter lengths. There were a couple of problems with my method. The thing that was a problem was accurately getting the crocodile clip to be placed at the right length on the wire because the crocodile clip was moving if it wasn't attached properly.