The Change of Resistance through Various Lengths of Wire
My results are reliable because they are close to the best-fit line. Also, there are close repeat readings, which means that the experiment is accurate. For instance, at 20cm the voltage was 0.28 for each reading (V1, V2 + V3). There are no anomalous results, there is an extremely strong correlation (see graph) very similar to my best fit line. However, at 140cm and 160cm, the results are slightly out. This is likely to be due to not measuring the wire carefully enough, it is unlikely to be the voltmeter or ammeter as the length is the only thing that I measured, and so I could have made a mistake easily. Overall, I do think that my results were very reliable. This is based on the fact that I took great care carrying out the experiment and also my results clearly show, as there is such a strong correlation and no odd results, that the experiment has been carried out correctly because my scientific theory has been proved correct.
There may not have been good electrical contact between the crocodile clip and the wire and this may have caused the readings not to be extremely precise. A more accurate ammeter that went to more than two decimal places may also have helped this problem. Without knowing it, there may have been a large difference between the real answer, and the answer the ammeter I used gave me.…
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- The Change of Resistance through Various Lengths of Wire
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