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Investigating into factors that effect the Current along a certain length of wire

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Expt: investigating into factors that effect the Current along a certain length of wire Factor Chosen: I have chosen to alter the length of the resistance wire throughout my investigations experiment. It has taken careful thought over a numerous amounts of aspects I could alter, but length came out the better one for me. Prediction: I predict that, as the length of wire gets longer as will the current decrease. I also further predict that, if the length of wire is doubled so will the current halve. Once again I shall predict that in a larger wire width ways there shall be an even larger current. Justification of predictions: A current flows through a length of wire at all times and if there is enough power it should always be the same. However I feel that as the length of wire gets longer it shall take more effort and the current will decrease, as there is a further distance for it to share the current over. Below is an equation that will help me find the current however as there will be a ammeter present. I (Current in Amps) = V (Potential Difference Volts) x R (Resistance in ohms) ...read more.


0.96 1.14 1.04 0.96 24.00 25 0.86 0.87 1.05 0.93 1.08 24.00 30 0.80 0.81 0.95 0.85 1.17 24.00 35 0.75 0.75 0.85 0.78 1.28 24.00 40 0.73 0.70 0.79 0.74 1.35 24.00 45 0.67 0.64 0.69 0.67 1.50 24.00 50 0.65 0.60 0.63 0.63 1.60 24.00 55 0.62 0.57 0.57 0.59 1.70 24.00 60 0.55 0.53 0.55 0.54 1.84 24.00 65 0.50 0.49 0.50 0.50 2.01 24.00 0 1.11 1.24 1.15 1.17 0.86 32.00 5 0.97 0.89 0.91 0.92 1.08 32.00 10 0.71 0.70 0.71 0.71 1.42 32.00 15 0.58 0.57 0.58 0.58 1.73 32.00 20 0.50 0.48 0.50 0.49 2.03 32.00 25 0.44 0.42 0.44 0.43 2.31 32.00 30 0.39 0.37 0.39 0.38 2.61 32.00 35 0.34 0.33 0.34 0.34 2.97 32.00 40 0.31 0.30 0.31 0.31 3.26 32.00 45 0.28 0.27 0.29 0.28 3.57 32.00 50 0.26 0.25 0.26 0.26 3.90 32.00 55 0.24 0.23 0.24 0.24 4.23 32.00 60 0.22 0.22 0.23 0.22 4.48 32.00 65 0.21 0.20 0.21 0.21 4.84 32.00 My results shall also be shown on graphs on the next page. How the chosen factor affected the current: From looking at my results and at my graphs it is clear to me of how my chosen factor (length) ...read more.


If I had also had more time I would've made the following improvements to my experiment. I would've made sure that each and every wire had been sanded and made more efficient for the current to run along. I may have also made sure that before each time the battery was completely charged so that there was no reason for it to drop the results. Another thing I might have done to my experiment with a great deal more time is extending it so that I could've made further work into the factors. I may have done a whole range of widths of wire in order to compare exactly how much change there is between an SWG in the wire. A more important factor that I would have altered is the components of the wire. If I had more time I could get a number of wires made by different materials, mixtures of both that conduct and some that don't conduct at all. By doing this I could've also experimented further into the factors whether the same rules apply to different metals and alloys, it may have been that in some the thinner the wire the less the resistance. I cannot quopte anything for this however as I did not test it. Ben Smith ...read more.

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