coursework resistance wire

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Coursework resistance wire

This sample is intended to inform the design of assessment instruments in the senior. Graph 4 Resistance versus cross-sectional area for nichrome wires. This diagram of the experiment. This particular experiment consists of changing the length of the wire to see the change and affect it has. The circuit should be set up as in the circuit diagram. It can be calculated from the potential difference across a component and the current flowing through it.

The total resistance of a series circuit is the sum of the resistances of the components in the circuit. Resistors, filament lamps and diodes produce different current-potential difference nbsp; Investigating the resistance of wires — Practical Physics wire. This resource has been recommended by FREE help sheet for teachers or students on energy stores, transfers, carriers, pathways and energy diagrams.

This is nbsp; Cyberphysics — Factors that affect the resistance of a wire of a component from measurements of the current flowing through it and the potential difference across its ends. Can you sketch a circuit diagram of a nbsp; Best 25 Gcse physics ideas on Pinterest Physics revision, Gcse on Pinterest. See more ideas about Physics revision, Gcse physics revision and Revision notes. Unit 3. Series and Parallel circuits.

Series circuit : in a series circuit there is only path and the bulbs B1 and B2 in the diagram below are one after the other. Controlled assessment tasks for GCSE Physics require candidates to: develop hypotheses and plan practical ways to test them including risk assessment. Resistance of wire coursework circuit diagram — KomDiM. Specimen Assessment Materials.

Resistance Coursework Planning: Aim Investigate how the length of a wire affects the current and resistance of a wire. Variables The variables that could change resistance are: o Length of the wire Cross section area thickness o Changing material so Changing temperatures The variable I am going to change in my experiment is the length of the wire. Prediction and Hypothesis I think as you increase the length of the Constantan wire, you also increase the amount of resistance.

The current is the flow of electrons; the current is dependent on the amount of voltage, which is applied. Voltage is the push given to the current. Disclaimer: This work has been submitted by a student. This is not an example of the work written by professional academic writers. Here you can order a professional work. Find a price that suits your requirements. 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.

Physics Project The Planning Key V A Variable resistor Ammeter Light bulb Voltmeter I am carrying out an experiment to find the different resistances created by a light bulb at different temperatures and currents. Because of the nature of a light bulb, it glows white-hot when fully on, the resistance will change at different currents. When the current is low and the bulb is not very bright, it List of equipment and circuit diagram o Power pack 6 connecting lead so Push switch 2 crocodile clip so Wire constantan o Voltmeter o Ammeter o Meter sticks Circuit diagram: Analysing: As the length increased so did the resistance.

This is because in a longer piece of wire the electrons have to push past more ions. The electrons have a negative charge and the ions have a positive charge. So energy is needed to keep the electrons flowing. The longer piece of wire the more energy needed. When the length is doubled so does the resistance. The resistance is directly proportional to the lengthEvaluationThe experiment proved to be a success and it went very well although it could be improved by trying other lengths, different voltages but also a different type of wire to be able to compare the resistance difference this would make a more interesting experiment.

Resistance and Current Vs. The Conclusion The This process wastes quite a lot of energy, because as the current increases, the resistance increases. When the current As the voltage and the current increase, the gradient of the curve also increase. This means that the resistance I could increase the I will take measurements of the current at 5 volts, Resistance: is a force that resists the flow of the current in a wire.

Home Essays Term Papers Dissertations. Electricity flows in metals. The metal is full of "free" electrons that do not stick to any particular atom; rather, they fill the space between the atoms. When these electrons move, they create an electric current. Conductors have resistance, but some are worse than others. The free electrons keep bumping into atoms.

A wire's resistance depends on four main factors:. I will investigate how the length of the wire affects the resistance. I have done a preliminary experiment to help me decide the best way to do my investigation. The results will help me make predictions, as well. Below are my results from the preliminary experiment see Table 1. These results show that as the length of the wire increases, the resistance increases, as well.

Furthermore, if you double the length of the wire, the resistance is roughly doubled. For example, when the length of the wire is 20cm the resistance is 3. In my main investigation I will see if this observation applies to my results. I found that the apparatus I used was suitable, but I think that I could possibly increase the number of data points to generate more reliable results, perhaps by increasing the length of the wire by 5cm each time, instead of by 10cm.

This is because the free electrons in the wire bump into more atoms, thereby making it harder for electricity to flow. Similarly, the shorter the wire, the smaller the resistance because there will be fewer atoms for the electrons to bump into, thereby easing the flow of electricity. Furthermore, the resistance of a wire is directly proportional to the length and inversely proportional to the area, so doubling the length of a wire should increase the resistance by a factor of two.

This is because if the length of the wire is doubled, the electrons bump into twice as many atoms, so there will be twice as much resistance. If this is correct, the graph should show a positive correlation. Next, I will set the power pack on the lowest voltage possible to ensure that the current passing through the circuit isn't too high which could potentially affect the results because the wire would get too hot.

I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. I will then turn the power pack on and record what voltmeter and ammeter readings. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack. Again, I will record the voltmeter and ammeter readings and turn off the power pack.

I will repeat this method every 5cm until I get up to cm, taking three readings from both the voltmeter and ammeter each time to ensure accuracy. To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading. I will also ensure that the wire does not heat up too much by confirming that I do not set the voltage too high on the power pack and by maintaining the same the voltage for every reading.

In addition, I will make sure I turn the power pack off after each reading. I will try to make this investigation as accurate as possible. There are different variables that can be changed in this experiment; these are the independent variable. Prediction Hypothesis : I predict that the longer the wire the higher the resistanceand the shorter the wire the lower the resistance. Knowledge: Resistance is that property of electric components that turn electric energy into heat in opposing the passing of an electric current.

It can be beneficial, as in electric heaters, or a pest, as in light bulbs, where the heat Resistance is the force that slows down the flow of electrons; this can be due to electrons colliding. The total length of the wires will affect the amount of resistance. The longer the wirethe more resistance that there will be. This is also true for thickness of wire ; the thinner the wire is the more resistance. Theory behind my experiment Thickness cross sectional area of the wirelength, and temperature all have some effect on the amount of resistance created in a wire.

Another factor is the conductivity of the material we are using. Some metals are just more electrically conductive than others. As long as I use the same type of metal for each wiremy experiment will remain fair. Cross Sectional Area The thicker the wirethe less resistant it is. This is because there are more electrons 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, and it is measured in amps using an ammeter.

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 resistanceusing three constantan The two results for cm are exactly the same, and it is near to the manufacture's line, so this is the most accurate point. The inaccuracy could have been because of the wire coming from a different manufacturer to the predicted results, as there is some discrepancy between the amount of copper and nickel in different brand's wire.

The ammeters Theory What is resistance? Resistance is a force which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. The circuit itself can resist the flow of particles if the wires are either very thin or very long.

The filament across an electric light bulb. How is it measured? Introduction In this piece of coursework, I have been set the task of investigating factors that affect the resistance of a wire. There are many things that affect the resistance of a wire but I have only got the chance to do one of these. The one I will choose will depend on it being the most effective and on its ease to do.

Firstly, I will give an explanation of how resistance works. Resistance is when travelling electrons in a wire collide with the atoms of the wire. It involves collisions between the free electrons and the fixed particles of the metal, other free electrons and impurities. These collisions convert some of the energy that the free electrons are carrying into heat. The resistance of a length of wire is calculated by measuring the current present in the circuit in series and the voltage across the wire in parallel.

These measurements are then applied to this formula:. It is also relevant to know of Ohm's Law, which states that the current through a metallic conductor e. This means that the resistance of a metallic conductor is constant providing that the temperature also remains constant.

Furthermore, the resistance of a metal increases as its temperature increases. This is because at higher In WriteWork.

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Resistance is measured in ohms. Apple is involved in the design, development and marketing of personal computers PC and related software, peripherals, network solutions, portable digital music players, and associated accessories. The company mainly operates in the US. It is head quartered in Cupertino.

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The problem with using resistance as a measurement is that it depends not only on the material out of which the wire is made, but also the geometry of the wire. If we were to increase the length of wire, for example, the measured resistance would increase.

Also, if we were to decrease the diameter of the wire, the measured resistance would increase. We want to define a property that describes a material's ability to transmit electrical current that is independent of the geometrical factors. In the case of the wire, resistivity is defined as the resistance in the wire, multiplied by the cross-sectional area of the wire, divided by …show more content… Not all materials are created equal in terms of their conductive ability.

Some materials are better conductors than others and offer less resistance to the flow of charge. Silver is one of the best conductors, but is never used in wires of household circuits due to its cost. Copper and aluminum are among the least expensive materials with suitable conducting ability to permit their use in wires of household circuits. The conducting ability of a material is often indicated by its resistivity.

The resistivity of a material is dependent upon the material's electronic structure and its temperature. For most but not all materials, resistivity increases with increasing temperature. Specimen Assessment Materials. Resistance Coursework Planning: Aim Investigate how the length of a wire affects the current and resistance of a wire. Variables The variables that could change resistance are: o Length of the wire Cross section area thickness o Changing material so Changing temperatures The variable I am going to change in my experiment is the length of the wire.

Prediction and Hypothesis I think as you increase the length of the Constantan wire, you also increase the amount of resistance. The current is the flow of electrons; the current is dependent on the amount of voltage, which is applied. Voltage is the push given to the current. Disclaimer: This work has been submitted by a student. This is not an example of the work written by professional academic writers. Here you can order a professional work.

Find a price that suits your requirements. 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. Physics Project The Planning Key V A Variable resistor Ammeter Light bulb Voltmeter I am carrying out an experiment to find the different resistances created by a light bulb at different temperatures and currents.

Because of the nature of a light bulb, it glows white-hot when fully on, the resistance will change at different currents. When the current is low and the bulb is not very bright, it List of equipment and circuit diagram o Power pack 6 connecting lead so Push switch 2 crocodile clip so Wire constantan o Voltmeter o Ammeter o Meter sticks Circuit diagram: Analysing: As the length increased so did the resistance.

This is because in a longer piece of wire the electrons have to push past more ions. The electrons have a negative charge and the ions have a positive charge. So energy is needed to keep the electrons flowing. The longer piece of wire the more energy needed. When the length is doubled so does the resistance. The resistance is directly proportional to the lengthEvaluationThe experiment proved to be a success and it went very well although it could be improved by trying other lengths, different voltages but also a different type of wire to be able to compare the resistance difference this would make a more interesting experiment.

Resistance and Current Vs. The Conclusion The This process wastes quite a lot of energy, because as the current increases, the resistance increases. When the current As the voltage and the current increase, the gradient of the curve also increase. This means that the resistance I could increase the I will take measurements of the current at 5 volts, Resistance: is a force that resists the flow of the current in a wire.

Home Essays Term Papers Dissertations. Electricity flows in metals. The metal is full of "free" electrons that do not stick to any particular atom; rather, they fill the space between the atoms. When these electrons move, they create an electric current.

Conductors have resistance, but some are worse than others. The free electrons keep bumping into atoms. A wire's resistance depends on four main factors:. I will investigate how the length of the wire affects the resistance. I have done a preliminary experiment to help me decide the best way to do my investigation. The results will help me make predictions, as well. Below are my results from the preliminary experiment see Table 1. These results show that as the length of the wire increases, the resistance increases, as well.

Furthermore, if you double the length of the wire, the resistance is roughly doubled. For example, when the length of the wire is 20cm the resistance is 3. In my main investigation I will see if this observation applies to my results. I found that the apparatus I used was suitable, but I think that I could possibly increase the number of data points to generate more reliable results, perhaps by increasing the length of the wire by 5cm each time, instead of by 10cm.

This is because the free electrons in the wire bump into more atoms, thereby making it harder for electricity to flow. Similarly, the shorter the wire, the smaller the resistance because there will be fewer atoms for the electrons to bump into, thereby easing the flow of electricity.

Furthermore, the resistance of a wire is directly proportional to the length and inversely proportional to the area, so doubling the length of a wire should increase the resistance by a factor of two. This is because if the length of the wire is doubled, the electrons bump into twice as many atoms, so there will be twice as much resistance.

If this is correct, the graph should show a positive correlation. Next, I will set the power pack on the lowest voltage possible to ensure that the current passing through the circuit isn't too high which could potentially affect the results because the wire would get too hot.

I will place one crocodile clip at 0cm on the wire and the other at 5cm to complete the circuit. I will then turn the power pack on and record what voltmeter and ammeter readings. I will switch off the power pack, move the crocodile clip that was at 5cm up to 10cm, and switch on the power pack.

Again, I will record the voltmeter and ammeter readings and turn off the power pack. I will repeat this method every 5cm until I get up to cm, taking three readings from both the voltmeter and ammeter each time to ensure accuracy. To ensure accuracy I will record the voltage and the current three times every 5cm and take the average reading.

I will also ensure that the wire does not heat up too much by confirming that I do not set the voltage too high on the power pack and by maintaining the same the voltage for every reading. In addition, I will make sure I turn the power pack off after each reading. I will try to make this investigation as accurate as possible. There are different variables that can be changed in this experiment; these are the independent variable.

Prediction Hypothesis : I predict that the longer the wire the higher the resistanceand the shorter the wire the lower the resistance. Knowledge: Resistance is that property of electric components that turn electric energy into heat in opposing the passing of an electric current. It can be beneficial, as in electric heaters, or a pest, as in light bulbs, where the heat Resistance is the force that slows down the flow of electrons; this can be due to electrons colliding.

The total length of the wires will affect the amount of resistance. The longer the wirethe more resistance that there will be. This is also true for thickness of wire ; the thinner the wire is the more resistance. Theory behind my experiment Thickness cross sectional area of the wirelength, and temperature all have some effect on the amount of resistance created in a wire. Another factor is the conductivity of the material we are using.

Some metals are just more electrically conductive than others. As long as I use the same type of metal for each wiremy experiment will remain fair. Cross Sectional Area The thicker the wirethe less resistant it is. This is because there are more electrons 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, and it is measured in amps using an ammeter.

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 resistanceusing three constantan The two results for cm are exactly the same, and it is near to the manufacture's line, so this is the most accurate point. The inaccuracy could have been because of the wire coming from a different manufacturer to the predicted results, as there is some discrepancy between the amount of copper and nickel in different brand's wire.

The ammeters Theory What is resistance? Resistance is a force which opposes the flow of an electric current around a circuit so that energy is required to push the charged particles around the circuit. The circuit itself can resist the flow of particles if the wires are either very thin or very long. The filament across an electric light bulb. How is it measured? Introduction In this piece of coursework, I have been set the task of investigating factors that affect the resistance of a wire.

There are many things that affect the resistance of a wire but I have only got the chance to do one of these. The one I will choose will depend on it being the most effective and on its ease to do. Firstly, I will give an explanation of how resistance works. Resistance is when travelling electrons in a wire collide with the atoms of the wire. The collisions between the electrons and the atoms cause the electrons to move slower, which in effect causes resistance. So, resistance is how hard it is to move electrons through a wire.

Now, the factors that affect the resistance of a wire are going to be described. Firstly, temperature is a factor. If the wire is heated, the atoms will move around more because there will be an increase in energy. This would cause more collisions between the atoms and the electrons. The increase in collisions would cause the resistance to rise. This would be very hard to do, because the equipment needed to do this experiment effectively has not been given to us.

Secondly, the width of the wire is a factor. This will cause resistance to decrease because of the increase in space in the wire. The increase in space means that there is more space for the electrons to flow freely because there would be fewer collisions with atoms. I could do this by using different widths of a wire; for example thin, medium, or thick copper could be used.

Thirdly, the material used would be a factor. The resistance increases as a result of the Diameter or thickness of wire. Temperature at which wire is kept. The material If the material being used contains atoms with a large number of electrons on the outer shells, then this means there are more electrons available. So, in theory, if the material has a large numbe of atoms, there should be less resistance, because of the higher number of electrons.

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Free Essay: The problem with using resistance as a measurement is that it depends not only on the material out of which the wire is made, but also the. PHYSICS COURSEWORK - RESISTANCE. PLAN. What affects the resistance of a piece of wire? There are many variables in this investigation. The resistance of the. Resistance of a wire coursework. Extracts from this document Introduction. Luke Ombler. Science Physics Investigation. Planning/Aim.