Evaluation Test one: This experiment was quite accurate, as launched compared to the companies line which is on the same chart, we can see this line is in most just 0. 5? different make up the manufactures series. This is a percentage difference of approximately 8%, using the formula: Big difference? original Times 100 This kind of shows that the results were good, as 8% is a very little margin of error. The error bars on the graph show that one of the most inaccurate consequence was the 60cm result. This can be down to an error in the dimension of the wire or a temp rise. The two results for 100cm will be exactly the same, in fact it is near to the manufacture's line, and this is the most exact point.

The other 3 readings include almost precisely the same inaccuracy, an average of 10%, which again, is pretty accurate. The inaccuracy could have been because of the cable coming from a diverse manufacturer for the predicted effects, as there is some discrepancy between the sum of water piping and pennie in different brand's wire. The ammeters and voltmeters might have been damaged and reading falsely on the two meters utilized.

Calculating the lengths of the cable is also a inaccuracy as the rulers used are certainly not exact, and it is difficult to acquire an accurate examining of size by eye, as the wire might not be completely directly, it may be of different thicknesses throughout the length. These would have offered as well towards the error. These results will be difficult to improve on as they are moderately accurate, and there were simply no anomalous results. But if We were to do this kind of experiment again, I would employ newer, more accurate ammeters and voltmeters, a more accurate method of measurement, and take a very much wider selection of readings, and even more readings so that a more appropriate average can be taken.

I would also investigate other factors, including temperature, volts and current, and see just how these effect the level of resistance. I would likewise do the trials under distinct conditions this kind of...


Exploring Links Essay

Milk Dissertation