Resistance coursework - some useful things :: essays research papers

Resistance CourseworkPlanningAim canvass how the length of a wire affects the current and metro of a wire.VariablesThe variables that could alteration rampart areLength of the wireCross section champaign (thickness) changing materialsever-changing temperaturesThe variable I am going to alteration in my experiment is the length of the wire.Prediction and HypothesisI hold as you increase the length of the constantan wire, you also increase the measuring stick of resistance. The current is the flow of electrons the current is dependent on the amount of voltage, which is applied. potential difference is the push given to the current. The current has to go through a circuit, which contains resistance so if you increase that push you also increase the flow of the current. tout ensemble materials have a slight resistance to electricity factors affecting the resistance are Length, potency & Temperature and Surface Area.Preliminary WorkChanging all the length of the wireLengthVolt age (V)Current (A)Resistance (&61527) forgetful5.450.2620.96Long5.560.2423.16Longest5.580.1929.36Conclusion the longer the wire, the higher the resistanceChanging only the cross section area of the wireThicknessVoltage (V)Current (A)Resistance (&61527)Single4.731.453.26Double4.441.982.24Triple4.342.072.09Conclusion the thicker the wire, the depress the resistanceChanging MaterialsMaterialVoltage (V)Current (A)Resistance (&61527)Constantan5.510.4811.47Aluminium1.828.630.21Conclusion different materials conduct electricity better Changing TemperaturesTemperatureVoltage (V)Current (A)Resistance (&61527)Cold2.276.720.34Hot2.627.000.37Conclusion I came to a conclusion that the decrease in current is the increase in resistance this is because the current although less of it they collide with the resistance causing a decrease in the output voltage. List of equipment and circuit diagram magnate pack6 connecting leadsPush switch2 crocodile clipsWire (constantan)VoltmeterAmmeter bar sticksCi rcuit diagramAnalysingAs the length increased so did the resistance.This is because in a longer piece of wire the electrons have to push past tense more ions.The electrons have a negative charge and the ions have a positive charge. So energy is needed to keep the electrons flowing.