We reduce the wire length by 5cm to prove that as the length decreases the resistance decreases, or vice versa. With this information I can put the figures into an equation that will work out how much resistance that particular wire has. Make Circuit with the set length of wire 3.
This experiment was done well and the aim was achieved, I have got my results but they are not perfectly accurate, and I had explained the reasons in my analysing section. Length Average Resistance Area Resistivity?. I think this will be the case as the thicker the wire is the larger the diameter is and there fore the room between the ions will be more spread out.
Change the lengths of wire and do same steps 2 more times. The length of the wire should be approximately proportionally the same as the resistance. The line of best fit proves me prediction correct as the line is in proportion that doubling the length of the wire theoreticly double resistance.
For example, electrons pass easily through copper wire, but much less easily through Constantan wires. Other aspects that could be investigated are the various variables mentioned in the planning.
This should produce a straight-line graph where resistance doubles when length doubles see following page. The temperature was kept the same, the width of the wire was kept the same and also the type of wire was kept the same.
As the electrons in an electric current move around a circuit, they bump into the atoms in the wires through which they pass. There maybe a few anomalies, but most points go through the line of best fit, with the other points close to it.
My results were not far away from the line of best fit and I have drawn the perfect graph in the analysing section, anyway, this does affect my confidence when I am making my conclusion. The interesting thing was that the lead would get very hot if the distance between two crocodile clips very short, I think it is because the particles collisions, which related to my scientific explanation in the planning.
Once I have got the readings from the ammeter and voltmeter I can put the data into this equation. This is called contact resistance and its impact on my results is unavoidable, therefore there is nothing I can do to decrease this effect. My results prove my prediction was correct. Because I may have a made a few mistakes such as the way the crocodile clips were moved, could have hindered my results, which were the movement of the clips.
These are the procedures I will take in order to make the investigation fair. The line of best fit proves me prediction correct as the line is in proportion that doubling the length of the wire theoreticly double resistance.
This statement can help to predict the fact that as the length of wire increases the resistance increases. Investigation Research Ohm, Georg SimonGerman physicist, best known for his research on electrical currents.
This will allow more room for the electrons to pass by. 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. February 6, Investigating the Resistance of Wire Investigating the resistance of a wire.
I think that the amount of times that we did the tests were appropriate and this was enough to satisfy me and my partner that we had a set of reliable results. The experiment has to be fair so that it is only length or thickness being altered and everything thing else which may affect the experiment is kept constant.
There are mixed views about this drug, some people want it legalized, other people don't. GCSE Physics Coursework - Resistance of a Wire Coursework Resistance of a Wire Task To investigate how the resistance of a wire is affected by the length of the wire.
Like the resistance to water flow, the total amount of resistance to charge flow within a wire of an electric circuit is effected by some clearly identifiable variables.
First, the total length of the wires will effect the amount of resistance.
The longer the wire, the more resistance that there will be. Resistance (?) = resistance of the metal(? cm) x length(cm) cross sectional area (cm2) The cross sectional area of the wire is constant, and so is the material I am using.
It is only the length that will be changing, so as you can see from the formula, the length and resistance must be directly proportional. 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 elleandrblog.comance is the measure of how easy it is for current to flow through a elleandrblog.comt is the rate of flow of charge through a conductor, and it is measured in amps using an ammeter.
To help me plan. Does the resistance of an electrical wire depend on its length? Essay. A. Pages:5 Words This is just a sample. To get a unique essay And on the graph of resistance against length the results are scattered in a pattern of positive correlation.
We will write a custom essay sample on Does the resistance of an electrical wire depend. We reduce the wire length by 5cm to prove that as the length decreases the resistance decreases, or vice versa.
Now with 45cm we used the same method to record resistance of the wire.
The whole procedure should be followed through each time, while changing the length of wire by 5cm.The length and resistance essay