I will use an analogy to help you. Imagine a tunnel or a door going into a football ground. This is the wire Then people who have to go through it. These are the electrons.
Free Essays Must Be Free! TM Gcse Physics Resistance Of A Wire Resistance of a wire gcse corsework essay While the free essays can give you inspiration for writing, they cannot be used 'as is' because they will not meet your assignment's requirements.
Waste no more time! Before starting my coursework I have decided to chose a factor that will affect the resistance of a wire. I shall do this by going through all of the factors that affect the resistance of a wire and how I would measuring each factor to find out which would be the most effective and easiest factor to measure.
Below is a list of factors and reasons why they affect the resistance of a wire. From this list of factors I shall only pick one factor to investigate.
To explain the how the factors would affect the resistance of a wire I have drawn a diagram to show how resistance occurs. These collisions slow down the flow of electrons causing resistance. Resistance is a measure of how hard it is to move the electrons through the wire.
If the wire is heated up the atoms in the wire will start to vibrate because of their increase in energy. This causes more collisions between the electrons and the atoms as the atoms are moving into the path of the electrons. This increase in collisions means that there will be an increase in resistance.
The type of material will affect the amount of free electrons which are able to flow through the wire. The number of electrons depends on the amount of electrons in the outer energy shell of the atomsso if there are more or larger atoms then there must be more electrons available. If the material has a high number of atoms there will be high number of electrons causing a lower resistance because of the increase in the number of electrons.
Also if the atoms in the material are closely packed then the electrons will have more frequent collisions and the resistance will increase. If the length of the wire is increased then the resistance will also increase as the electrons will have a longer distance to travel and so more collisions will occur.
Due to this the length increase should be proportional to the resistance increase. If the wires width is increased the resistance will decrease.
This is because of the increase in the space for the electrons to travel through. Due to this increased space between the atoms there should be less collisions. To chose which factor I am going to investigate I am going to consider how I would measure each factor and which factor would be the best and easiest to record.
To measure the wire width I would use different widths of the same length and same material of wire e. To record the difference in widths I would use the same voltage and measure the resistance for each thickness. Although it would be easy to obtain and record the data the graphs that I would be able to draw up would not be interesting.
For the temperature of the wire I would not be able to carry out a fair test because it is extremely difficult to produce and control the range of temperatures needed without the correct equipment. If I chose to measure the difference in the resistance in different materials I would chose a number of different materials and using the same voltage I would record the resistance given by each wire of the same length and width.
Although once again it would be simple to record these results the graphs that could be drawn would not show any connection between the material and the resistance because of the limited number of materials I could test with the equipment available.
The final factor is the length of the wire. To measure and record the findings for this factor would be simple and the results collected could show a connection between the length of the wire and the resistance given by the wire.
This is why I have chosen to investigate this factor. Prediction I predict that if the length increases then the resistance will also increase in proportion to the length.
I think this because the longer the wire the more atoms and so the more likely the electrons are going to collide with the atoms.
So if the length is doubled the resistance should also double. This is because if the length is doubled the number of atoms will also double resulting in twice the number of collisions slowing the electrons down and increasing the resistance.
My graph should show that the length is proportional to the resistance. The diagrams below show my prediction and should explain it more clearly: Because the length of the wire is only half the length of the wire below there should be half the number of collisions between the electrons and the atoms.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.
Resistance is the measure of how easy it is for current to flow through a wire. Current is the rate of flow of charge through a conductor.
Essays Tagged: "nichrome wire" tigate the factors of affecting the resistance of a initiativeblog.com this experiment I will be using a metal nichrome wire to show the resistance when the length and width is initiativeblog.comlesVariables that I Resistance of a wire (GCSE corsework).
- 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.
Theory What is resistance. Electricity is conducted through a conductor, in this case wire, by means of free electrons.
Resistance decreases if the cross-sectional area is increased. This sometimes confuses people, as it's not obvious. Look at these two pieces of metal: The narrow wire has fewer paths available for the electrons to move through.
Whilst the larger wire has many more routes they could take. This makes conduction easier. Gcse english creative writing coursework a examples: Coursework on a cv: Bournemouth university coursework cover sheet: Gcse english language creative writing coursework. GCSE Physics Coursework - Resistance of a Wire I believe that if I collected results over a wider range of Physics Gcse Coursework: Resistance of Wire - StudyMode Studymode › essays › Physics-Gcse-Coursework-Resistance-Of Physics GCSE coursework: Resistance of wire (in Step 8) to find the resistance.