Plot a graph of your results this graph is known as the voltage-current characteristic of the lamp e replace the lamp in the circuit with the resistor repeat the experiment and calculate its resistance. An investigation into the resistance of a wire free gcse physics coursework essay more sign in join 47 owlcation » stem » physics an investigation into the resistance of a wire - gcse physics coursework updated on december 30, 2016 so there will be twice as much resistance if this is correct, the graph should show a positive. For years our physics coursework experts have inspired students worldwide by providing the most extensive, lowest-priced service for physics coursework writing and research regardless of your deadline, budget, specifications, or academic level, we can provide immediate help for your physics resistance gcse coursework essay, term paper, book. The classic physics experiment this was designed as an intro for an isa but could be used for this practical in any syllabuss it includes model results, info on variables , anomalous data and graphs. The resistance of a thin wire is greater than the resistance of a thick wire because thin wire has fewer electrons to carry the current resistance can be found by measuring the current flowing.
Voltage-current graph for a metal conductor when metals are heated it causes the atoms in the metal to vibrate more imagine an electron in a current travelling through heated copper it's trying to flow through the metal but the atoms are vibrating more, so they are going to get in the way more, causing more collisions more collisions gives more resistance. Physics gcse coursework: resistance of wire aim: to investigate if the length of wire affects its resistance prediction (hypothesis): i predict that the longer the wire the higher the resistance, and the shorter the wire the lower the resistance. Gcse physics coursework - resistance of a wire courseworkresistance of a wiretaskto investigate how the resistance of a wire is affected by the length of images for gcse physics coursework resistance wire. Physics experiments (electricity) plot a graph of resistance against temperature and join the points in a smooth, continuous curve the value of r may be determined from the reciprocal of the slope of the graph 1 m of 26 swg nichrome wire, wound on a plastic comb, may be used in this.
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. Physics 2007 sample assessment instrument and indicative responses relationship between length and resistance copper wire of nominal diameter wire and of the nichrome wire was measured, so that a graph could be produced to see if the result was linear. Resistivity and resistance physics lab vii objective graph the resistance, r, resistance of the wire, the voltage drop across the wire, and the current passing through the wire explain your reasoning 5 suppose a piece of wire is connected to a battery a second piece of wire, made of. Current and resistance 7-12-99 electrical resistance voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.
Resistance electric current is the flow of electrons as these electrons flow around a circuit they bump into the atoms in the conducting wire and electrical components. Physics gcse coursework: resistance of wire essay physics gcse coursework: resistance of wire aim: to investigate if the length of wire affects its resistance a graph can be plotted easily, there is a large range of results and the results can be recorded easily. Uncertainty calculating cross sectional area of wire from the diameter graph drawn with correct scales and accurate plotting to show relationship between resistance and cross sectional area candidates must not be instructed or advised in these areas. Best answer: the resistance of a conductor depends on the resistivity of the conductor material (r), its cross section (a), and its length (l) as follows: resistance = r x l/a so the longer the wire the higher the resistance and the larger the cross section the lower the resistance.
Factors that affect the resistance of a wire the resistance of an object is a measure of the how reluctant current is to flow through that object it is given the symbol r and has the unit w (which is a greek letter omega and pronounced 'ohm'. What is resistance it contains a thin coil of wire called the filament this heats up when an electric current passes through it and produces light as a result ohm's law revisited graph showing current on the y axis and voltage on the x axis a line is drawn through the centre of the graph at 45 degrees. Gcse physics coursework - 2005/2006 introduction according to ohms law, a higher resistance simply means a larger amount of energy is used to move the electrons through the wire as they collide with the atoms.
The 120-watt bulb has the lower resistance and using ohm's law, one would expect it also has the higher current in fact, the 120-watt bulb would have a current of 1 amp and a resistance of 120 ω the 60-watt bulb would have a current of 05 amp and a resistance of 240 ω. Introduction: in this coursework investigation, i will be doing a series of experiments to see how changing the length of a piece of wire affects the resistance of the wire gcse physics introduction: in this coursework investigation, i will be doing. I am currently doing my physics coursework and i was just wondering if you could help me get a bit more scientific information on why things occured and happened the way they did basically i am studying how length affects the resistance of a wire and i have initially completed this project but i am just re-reading and adding in some information.
A 12-gauge wire is wider than 14-gauge wire and thus has less resistance the lesser resistance of 12-gauge wire means that it can allow charge to flow through it at a greater rate - that is, allow a larger current. Observe changes to the equation and wire as you play with the resistivity, length, and area sliders sample learning goals predict how changing each variable will affect the resistance. To get the full marks for my gcse coursework how does length affect the resistance in a wire i need to provide an alternative experiment that i could perform if i were to redo the investigation i have already calculated resistance in circuit using ohm's law and predicted results using the. This circuit has a total wire resistance (wire 1 + wire 2) of 30 ω at standard temperature setting up a table of voltage, current, and resistance values we get: at 20 o celsius, we get 125 volts across the load and a total of 15 volts (075 + 075) dropped across the wire resistance.
Graph description: in the graph, i have drawn out you case see the shape consists of a straight line that passes through the origin with a positive correlation it is clear that as the length increases, so does the average resistance of the wire. For resistance wire (at constant temperature) you've already seen that current is directly proportional to voltage: this means, of course, that the resistance of the wire is constant, no matter what the voltage, as long as its temperature doesn't change. I did an experiment to investigate how current varied with changing resistance and plotted my results on a graph of 1/current against resistancethe graph is a straight line showing $1/i$ to be dir.