An investigation into the theory of resistance Essay

My results agree this as the graph of duration against guard shows that kind is directly proportional. As the points on the graph be very close to the retrace of best fit, this supports my prediction. as well as I repeated my experimentation 3 times and obtained very like results, it shows that this experiment is quotable and rock-steady. So, I conclude that as the distance of outfit increases, so does the resistance. I fix realised as well as that double the length message double the atoms, which manifold the collisions and in turn, as explained in my prediction, doubles the resistance.This leads me as well as to believe that resistance would be less in smaller wires, this is due to higher current and increase heat. During the investigation three study swaps were brought to my attention, these changes were - As I increase the length of wire, a. ) The potential difference increased b. ) The flowing current decreased c. ) The resistance in the wire also increased. I a lso effect that when doubling the length of wire the resistance forget much or less double also.E. g. when the length was 50cm the resistance was 4. 00Ohm, and when the length was 100cm theresi e was 8. 00Ohm. Evaluation The experiment I carried out was completed by means of very basic school laboratory equipment. Although reliable and trustworthy evidence was collected, proved by the similar 3 times repeated results and matching line of best fit to my prediction, I believe my results could pull in been far more accurate with a great time span and some far more enhanced technical equipment, such as a digital multimeter. Although during my experiment there were no major anomalies there were a few variations within my repeats of the experiment.These insignificant variations truthfully had no major effect on the overall experiment due to the diminutive purpose of them. Nevertheless these small variations may concur legion(predicate) similar reasons for appearance of which that the major anomaly would have on occurrence. These reasons could consist of such things as light(a) connectivity and/or faulty equipment Human error (inaccurate readings and/or checks) Temperature (collision speed alterations) To improve the truth of my experiment It would have been helpful if The wire was in a temperature controlled environment, this is because resistance is affected by temperature. The voltmeter and ammeter were difficult to take a reading off, this is due to the unsettling of the actual readings, they flicker and change several times before stopping on a final reading. If you move slightly however, the results leave flicker again and become distorted. To prevent this, a better quality analogue meter with a built in mirror to prevent parallax could be used to my advantage. Also, if I had more time I could have extended my experiment and repeated it with shorter intervals of wire.I could have taken readings either 5cm instead of every 10cm, this way I coul d gather more education and add a set of supplementary enlarge to my results. If I changed all of the above, in theory I should come across far superior accuracy in my readings. If this theory is correct my results graphs should show a stronger correlation. If I were to present extra evidence I could make the following changes for further experiment. Increase length of wire Increase the thickness of the wire, Change the real(a) of the wire. If the above three changes were investigated for further experiment, I would try for that they would only validate my predictions and basically back up my evidence.