Human hand catching an object Essay

ANALYSING From this experiment I have make up out that there are incompatible positionors that pertain the confrontation of a wire. The factors that I have investigated are the length and heaviness of a wire. In the experiment, as the wire got shorter, the tube decreased, and if the wire were change magnitude thus the opposition would increase too. If the thickness of a wire were to be changed then the thicker the wire, the less defense and the thinner the wire the more resistance it will have. I have in like manner found out that the resistance is calculated by dividing the voltage by the current.This calculation was apply in my experiment and showed that the resistance is roughly unending. If some odd results were come uped, it was because at a low voltage the power packs are wide of the mark and at a high current, we might gain a heating effect. Ohms right can be proved by the graph due to the fact that the graph has a straight line therefore it has a constant gra dient, meaning a constant resistance whatever current is going away d unmatchable it, providing the temperature is constant. If the graph were a curved, then that would mean that the resistance was changing.If that were the reference the resistance could be found for any point by pickings the pair of values (V, I) from the graph and sticking them in the formula R= V/I. (Information agreeed from physics revision guide. ) That would be disobeying Ohms law. In my opinion, the resistance of the 32- slob wire seemed odd since the thinnest wire is supposed to have the highest resistance. besides a good conductor, which is what copper is, will allow current to lessen finished it easily. Therefore thats why the ammeter tuition for the copper wire, which measures the current, was genuinely(prenominal) high, matchd to the reading of the other types of wire.A nichrome wire would have more resistance than a copper wire of the same size, because less current flows through it, making it non such a good conductor. We can also conclude that the thickest wire, type 26, had the highest resistance because less current could flow through it. EVALUATING This investigation was conducted following the method above. By following those steps, I managed to obtain more than replete readings to plot a graph with and I managed to obtain accurate results, until the wire reached 30cm (TABLE 1). However my previous readings were fairly accurate, which were more decorous for me to plot a graph with.I had seven readings when only 6 are needed to plot a graph. The results of the origin experiment my concourse conducted, (TABLE 2) were much more accurate than the second one (TABLE 1). The resistance was very constant, however we did not complete the experiment. We planned to carry it on the succeeding(prenominal) lesson, but it would not have been a fair test because we used a different power pack and the voltage was not the same. We found out that we were getting odd results to our previous ones therefore we had to start the building block thing again.We made sure we finished that experiment and even had quantify to conduct another an investigation to find out whether the thickness of a wire would affect the resistance. Since I only had to investigate five different wires, obtaining five results, this investigation was easier to conduct because there were fewer to do and I knew exactly what I was doing. It took me less time to set up the electrical circuit and it was definitely a fair test. However when it came to the 32-copper wire the resistance was very high. I expected it to be high because it was one of the thinnest wires, however not that high.I suspect I either recorded the wrong reading or because at low voltage the power pack was inaccurate and at high current there was a heating effect. However, as I mentioned in the analysing section, there was a simpler explanation. From previous work, I remembered copper is a very good conductor, therefo re the high current reading. In future if I conduct another similar experiment to this one there are some improvements that could be made I could differentiate my results with other people to see if they got the same or near enough results.That way I would know whether I was on the right tracks. If I am stuck on connecting the circuit, I could draw a diagram first and follow that. I should finish every experiment the same sidereal day so that I get more accurate results and can compare the results to the results of another experiment, on the same subject and would not have snitch time having to start the same experiment again. I could have through some further research and find out what and if there are any other factors that affect the resistance of a wire and then I could have conducted an experiment.