The resistance in a wire increases as the length of. How the Length of a Wire Affects Its Resistance In my physics coursework I am going to investigate the effect of the length of a wire on its resistance. Introduction: This first report in Physics will show the investigation of how the length of a wire affects its resistance. As I predicted that as the length of wire increases, the resistance will also increase. Ammeter- measure the current of the circuit? For example, in table 1 for the first current in 100cm, it was 1. This is because it will take longer for them to pass from one side of the wire to the other side.
Let me be more specific. This is because the longer the wire, the more times the free electrons will collide with other free electrons, the particles making up the metal, and any impurities in the metal. Introduction: Some metals such as copper, silver and gold are very good conductors of electricity. For an electron, the journey from terminal to terminal is not a direct route. As shown by the equation, knowing the length, cross-sectional area and the material that a wire is made of and thus, its resistivity allows one to determine the resistance of the wire.
Prediction I predict that when I change the length of wire, the resistance will change. An increase in cross sectional area results in a decrease in resistance. To ensure that my equipment is safe I will switch off the power pack after collecting the necessary results for each length of wire, to prevent overheating of both the equipment that I will be using and the wire. This shows that my all of my results and readings are accurate and that I had no problems with any of the equipment. I have, however, drawn two different lines of best fit, because my results from wire lengths of 150cm to 300cm are such a big 'jump' away from my other results, that I believe that, as we recorded the two sets of results 20cm-100cm and 150cm-300cm on different days, we performed the experiment with the longer lengths of wire on the wrong voltage, a higher voltage than 2v.
To help me plan my investigation I have completed a preliminary experiment in which I investigated the effect of the thickness of a wire on its resistance, using three constantan wires and one copper wire. Use the widget below to determine the resistance value from the colored stripes. A variable resistor or rheostat is used to vary the current in a circuit. Resistance is the measure of how hard it is to get a current through a component in a circuit at a particular potential difference. Put another way, the diameter of wire B is two times greater than the diameter of wire A. Obtaining Results Below are the results of how wire affects the resistance. How could the material start resisting more at one place, just by adding another wire at some other place? How could that make the resistance go down? Google DoubleClick Google provides ad serving technology and runs an ad network.
I will be using constantan wire starting of with 1m length and then decreasing it by 0. I could have also used a well calibrated ruler, so as I could have measured the exact length I wanted, as I may have made errors with this. As in the preliminary experiment, different wires have different resistances but also the length of the wire will affect its resistance. These results show that as the length of the wire increases, the resistance increases, as well. I am interested in studying a criminology and criminal justice degree to fulfil a deeper understanding of what crime and criminal justice behaviour actually is? Larger currents are needed to supply the extra energy. If you use a mains power supply, use one that is designed to limit the output current to about 1 amp, and preferably with a current overload indicator. This means that they need only a tiny amount of energy in order to allow the electron to move.
After the observations we settled on two other more focused inductive questions: how does technology affect interactions between two or more people in a prosocial environment coffee shops, in this instance and how do people depend on technology? Below is a table illustrating the effect of changing the variables see Table 2 : Safety I will ensure experimental safety by confirming that all the wires are connected properly and that none of the insulation on the wires is worn. I had difficulties in taking some results as power packs made the wire dangerous, so as then the results could not be accurate enough as the temperature of the wire may affect the resistance. The longer the wire, the more resistance that there will be. There maybe a few anomalies, but most points go through the line of best fit, with the other points close to it. Imagine you have a single strand of wire. I will then find the average of these results by calculating the mean.
In theory, the length should be proportional to the resistance. Introduction Broadly speaking, there are two schools of thought about the relationship between globalisation and nationalism. The greater the resistance the harder it is for the current to flow and the move energy that is converted to heat and light. But there's no escaping the fact that a 2-inch wire has double the resistance of a 1-inch wire, and a 1-foot wire has 12 times as much. The main factors that affect the resistance in a conductor are: · Length · Temperature · Cross sectional area · Material · Magnetism The factor that we are going to change is the cross sectional area.
Resistance is the opposition to the flow of electric current through a material. This is so vivid which shows that culture is not limited to beliefs, values and etc. . I also think that the length of the wire and the resistance may be proportional and that if the length of the wire doubles, the resistance will also double. The idea of resistance is simply how difficult it is for the electrons to move through a material. The foliage becomes damaged when water that has been treated with salt is sprayed up from passing by vehicles Gould, 2013. As the sliding contact moves, it varies the length of wire in the circuit.
This is, as the length of wires increases, so does the resistance also increases, due to more electrons colliding with each other. Now this part is interesting, look what happens when we use conductance in the parallel circuit resistance equation. Resistance the physics classroombbc gcse bitesize resistance. This means acuriousmind temperature affects resistance because then the of circuit is independent wire length but how does a effect it's resistancei think that will affect its. And so when distributed, each of you gets half as much as you got before, and hence you end up moving slower. Some of this kinetic energy is changed into heat energy, causing resistance. This is because if the wire was twice as long it would have twice as many atoms for the electrons to collide with making it twice as hard for the current to flow.