This website uses cookies to ensure you have the best experience.

To Investigate The Factors Of Affecting The Resistance Of A Wire.

2050 words - 8 pages

Physics Coursework- Ohm's LawAim: To investigate the factors of affecting the resistance of a wire.In this experiment I will be using a metal nichrome wire to show the resistance when the length and width is changed.VariablesVariables that I am going to keep the same. Variables that I am going to change.Width- 0.36mm2Material- Nichrome wireVoltage- 2VTemperature- Room TemperatureLength- 10cm, 20 cm, 30cm, 40cm, 50cmMaterial- NichromeLength- 50cmVoltage- 2VTemperature- Room TemperatureWidth- 0.36mm2, 0.32mm2, 0.24mm2, 0.16mm2, 0.12mm2, 0.08mm2In this experiment I am going to use the nichrome wire as a conductor and I will be measuring the resistance by using an ammeter and a voltmeter because electricity can pass through the nichrome wire and the voltmeter will give me the volts produced and the ammeter will give me the amps produce, therefore these readings can be used to find the resistance.The resistance of a conductor is defined by the equation: R=VIResistance = Potential difference (Voltage)(V)Current (amps)Therefore I will be using this formula to give me the resistance, where the voltage divided by the current will equal the resistance.Metals conduct electricity because the atoms in them do not hold on to their electrons very well, and so creating free electrons, carrying a negative charge to jump along the line of atoms in a wire. Resistance is caused when these electrons flowing towards the positive terminal have to 'jumps' atoms. So if we double the length of a wire, the number of atoms in the wire doubles, so the number of jumps double, so twice the amount of energy is required: There are twice as many jumps if the wire is twice as long. The thinner the wire is the less channels of electrons in the wire for current to flow, so the energy is not spread out as much, so the resistance will be higher: We see that if the area of the wire doubles, so does the number of possible routes for the current to flow down, therefore the energy is twice as spread out, so resistance might halve.Resistance occurs when the electrons travelling along the wire collide with the atoms of the wire. 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.The factors of resistance are;1.Temperature: 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.2.Material: The type of material will affect the amount of free electrons that are able to flow through the wire. The number of electrons depends on the amount of electrons in the outer energy shell of the atoms, so 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...

Find Another Essay On To investigate the factors of affecting the resistance of a wire.

Resistance of a Wire Essay

1564 words - 6 pages 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. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. it has less resistance. For example

Resistance of a Wire Essay

1064 words - 4 pages A. PlanningPlan of the method to be used: -The resistivity of nichrome can be determined using the equation ??=?RA/LWhere:R:- Is the resistance of the wire in ?"ohms" and can be determined using the equation R=V/I where "V" is voltage in volts and "I" is current inamperes.L:- Is the length of the nichrome wire used in metres.A:- Is the cross-sectional area of the wire in metres square and can be determined using the equation A= ??d2 where "d" is

Resistance of a wire

1284 words - 5 pages wire. It does not pass trough as easily in a thin nichrome wire of an electric fire element. This wire has much more resistance. Energy has to be spent to force electrons through it. And heat comes off as a result.All conductors have some resistance but:- Long wires have more resistance than the short wires.- Thin wires have more resistance than thick wires.- Nichrome wire has more resistance than copper wire of the same size.Resistance is

Investigating how the resistance of a wire Changes with length

1088 words - 4 pages AimThe aim of this investigation is to reveal that the factor of length affects the overall resistance. So when changing the length of the conductor does resistance increase or decrease.PredictionI predict that as the length of the wire decreases so will the resistance. This is because through a shorter length of wire would allow more current to move through at a higher rate than a longer wire.When the wire increases then the resistance will

Talking about investigating the resistance of a wire

1037 words - 4 pages Aim:The aim of this is to investigate how the length of a wire affects the resistance of it.TheoryResistance 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. E.g. the filament across an electric bulb is quite thin as needs to resist the flow of

A Physics Investigation of the Resistance: Of A Piece of Wire?

2289 words - 9 pages Aim:The aim of this investigation is to investigate and discover if the length of a piece of metal wire effects its resistance when electricity is passed through it.PredictionBefore I make a prediction I shall explain about atoms, free electrons, electricity and resistance.Electricity travels through a conductor, in this case a length of wire, by means of free electrons. Electrons are the smallest parts of an atom that is situated in shells

GCSE, Physics: What affects the resistance of a piece of wire?

2625 words - 11 pages (charge)t (time, sec)And also because R (resistance)= V (voltage)I (current),this means that twice the current halves the resistance when p.d. is kept constant.To chose the wire factor that I am going to investigate I will first look at all the factors, and how they would be controlled. Firstly, the temperature of the wire, a rise in temperature should make the resistance increase, this factor would be hard to control and therefore not the one I

Will the length of wire affect the resistance?

833 words - 3 pages the current going across the wireFor my experiment I will proceed to test out whether the length of the wire will affect the average resistance. Before I can carry out my real experiment, I will need to do a preliminary experiment that will tell me how much voltage I will need for the varying lengths of wire. I will use the wire called WG28 Constantan wire.FAIR TESTINGTo make the experiment a fair test, I will need to keep all the equipment the

Resistance of a wire (GCSE corsework)

2812 words - 11 pages Does Increasing the Length of a Nichrome Wire Affect its Resistance?IntroductionIn this experiment I am going to see weather the thickness of wire will affect the resistance of a wire. I will also be seeing weather different lengths of wire effect the resistance of the wire. I will be setting up the wire to a circuit and will be using a ammeter and volt metre to record my results.Background informationElectric current is a flow of electrons

Physics coursework - Resistance of a wire

1250 words - 5 pages GCSE Physics Coursework - Resistance of a WireAim: To investigate how the resistance of a wire is affected by the length of the wire.What is resistance?Electricity is conducted through a conductor, in this case wire, by means of free electrons. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. it has less resistance. For example, gold has more free electrons than iron and, as a result, it

Physic Sc1 Resistance Of A Wire

1468 words - 6 pages How the resistance of a wire changes with different lengths Planning We are trying to find out if and how the resistance of a wire changes by adjusting the length of the wire. I think that as the length increases; the resistance will also increase. I think this will happen because in previous experiments, my results have shown this. For example: I have done an experiment where I had to find out what variables affected the resistance of a wire. I

Similar Essays

Factors Affecting The Resistance Of A Wire

1216 words - 5 pages METALAIM:To investigate how the length of a Nichrome wire can affect the resistance of a wirePREDICTION:In my opinion the longer the wire the more resistance there will be. I believe this because 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 collision and friction will occur.VARIABLE FACTORS:The factors that I am going to vary are the length of the

What Factors Affect The Resistance Of A Piece Of Wire(Evaluation Missing)

895 words - 4 pages Aim:The aim of this is to investigate how the length of a wire affects the resistance of it.Prediction:I predict that the longer the piece of wire, the greater the resistance will be. This is due to the idea of the free moving electrons being resisted by the atoms in the wire. In a longer piece of wire, there would be more atoms for the electrons to collide with and so the resistance would be greater. The relationship between the wire length and

Experiment To Investigate Factors Affecting The Rate Of Reaction Between Magnesium Ribbon And Hydrochloric Acid

2245 words - 9 pages Experiment to investigate factors affecting the rate of reaction between magnesium ribbon and hydrochloric acid Rates of Reaction: Investigation Experiment to investigate factors affecting the rate of reaction between magnesium ribbon and hydrochloric acid. Chemical reactions between substances are caused by the collision of particles. More collisions mean a quicker rate of reaction. In the reaction between hydrochloric acid and magnesium

The Resistance Of A Wire Essay

760 words - 3 pages TaskTo investigate how the resistance of a wire is affected by the length of the wire.TheoryWhat 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.e.g. The filament across an electric light bulb.How is it measured?The