Carbon in the form of a pencil Essay Example for Free

Carbon in the form of a pencil EssayAlthough with this trace I could not prove that breadth and resistance of a atomic number 6 track present an inversely proportional relationship, this besotteds that as cardinal increases the other decreases in proportion. Although to show that this relationship applies in this baptistry I halt to plot in a graph resistance against the reciprocal of the width (which is 1 divided by the width). When I did this the graph produced a set of results which when a contention of best see was drawn it produced a straight tune which passed through zero. This means that my prediction that width and resistance would be inversely proportional was true. The shape of the initial graph of width against resistance also shows simply that as the width increases the resistance decreases. The resistance also decreases far quicker for the smaller widths and as the width gets to intimately 5cm although it is still decreasing it is much more gradual. Eva luation I believe that using my results I depose draw useful and correct observations this is because I repeated either reading I took three multiplication and then averaged them.I then plotted the graphs with the averaged results meaning that they are fairly reliable. Although, there are almost results I feel especially on the width and resistance graphs that appear anomalous and I would have liked to repeat these readings again but due to time restraints I couldnt. In particular the resistances of the widths to a higher place 4cm appear incongruent. This may be because on the larger widths the contact did not span the faultless width of the carbon track (as shown in the diagram below) although on the smaller widths, which produced the results, I had expected it did span the entire width.The results may have also been affected by the fact that the contacts remained in the same place for every reading, meaning that towards the end as the contact had a fairly sharp edge the carb on where the readings were macrocosm taken may have been rubbed off. This would mean that the resistance would be greater than expected which is the case in the later results. Therefore if was to do the experiment again and had unlimited time I would have redrawn the width stage business every time so that the effect of the contacts rubbing off carbon would not have an effect.This is because the contact would not have been remote from the track and so no carbon could be removed from the track. Another improvement to the experiment I would make would be improving the accuracy of the carbon track. This would mean that the carbon would be uniformly thick throughout the line and would go exactly up to the line and not pass it. This is so that we could know that the resistance was of exactly 5cm was not the resistance of between 4. 5cm and 5. 5cm.To do this I would make a template for the carbon track, which, could be coloured in ensuring that the carbon would no go past where it is, desired which happens no matter how hard you try to stay within the lines. An illustration of this is in the carbon track I drew, which appears to be quite good in that no carbon went over the lines but on closer inspection it in place is over a millimeter past the line. My carbon line in normal view As you can see the line appears perfect. Magnified view of Carbon trackThis closer view shows that the carbon track is by no means perfect and this degree inaccuracy means that the results may not be what they should. The patterns in my graphs were fairly taken for granted(predicate) to find and I believe that when I did use a straight fit best line instead of a curve it was acceptable because it was more fitting for the readings. Show preview only The preceding(prenominal) preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section. Download this essay Print Save Not the one? Search for