How the Length of a Wire Affects its Resistance

How the Length of a Wire Affects Its rampart In my physical science coursework I am going to investigate the effect of the aloofness of a outfit on its resistance. Resistance is the measure of how sluttish it is for circulating(prenominal) to hang up through a outfit. menses is the rate of flow of tear through a conductor, and it is heedful in amps using an ammeter. To serve well me plan my investigation I have completed a preliminary audition in which I investigated the effect of the weightiness of a fit on its resistance, using three constantan fit outs and one diddly equip. I found that the resistance change magnitude as the thickness of the cable decreased, however, when I did the test with the copper wire I found that it was so unresistant that there would not be a lot of point in conducting my look into using a copper wire beca practice posing I would not really be able to comp are the results. I therefore decided to use a wire of a higher resistance; constantan, because it go out master me to get more than reliable and comparable results. Preliminary essay results: Wire type/diameter         Resistance (W) Copper 0.2mm         1.8 W constantan 0.2mm         9.1 W Constantan 0.45mm         5 W Constantan 0.9mm         1.8 W Diagram: The things that I provide measure and line up are the voltage running through the wire and the current. This go out allow me to calculate the resistance of the wire.

To calculate the resistance of the wire I will divide the voltage (V) by the c urrent (I), which will give me the resistanc! e in ohms (W). Equipment: The equipment that I will use is: -         power pack -         ammeter -         voltmeter -         30 SWG (diameter) constantan wire -         1 metre ruler -         leads -         crocodile clips Method: This is on the cover what I will do: 1) ... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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