# Length Of Wire Affects Resistance Coursework

## Investigating How The Resistance Of A Wire Changes With Length

Aim

The 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.

Prediction

I 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 increase also. This is because as there is more and more wire there are more obstacles for the electrons to go around.

In my investigation however, relating with the certain lengths I expect twenty centimetres of wire to resolve in the lowest of resistance. Whereas, the length one hundred centimetres, I expect to carry the highest resistance. Therefore I expect more current to flow through on the shortest piece of wire.

Hypothesis

Current flows through a circuit. Resistance is any opposition that prevents current from flowing through a circuit. Resistance is measured in ohms. The way to work out resistance is by this formula: R= V/I. There are many factors that cause and change resistance. Such as temperature, when the particles are heated they receive more energy causing them to vibrate and agitate. This causes more obstacle and obstruction for the electrons to easily pass through. When represented with a longer wire, resistance will increase. This is because it takes much more time for an electron to pass through. A shorter wire will allow current to pass through at a much higher rate. Resistance is also affected by cross sectional area. The wider the wire is the more electrons will pass through at any one time. But length is the most important one in this experiment.

As you can see from the diagram the shorter wire allows more electrons to pass through it at a higher rate. The longer wire though, the electrons are still travelling through the circuit not allowing them to rapidly conduct.

Apparatus

For this experiment I used...

*Ammeter

*Voltmeter

*Wires (with crocodile clips.)

*Battery Pack

*Meter stick

*Nichrome Wire

This diagram of the experiment.

Variables

This particular experiment consists of changing the length of the wire to see the change and affect it has on the resistance. I plan to the take readings current when the voltage is at two, four, six and eight. So I am also changing the voltage, electrical push, as well to find an average resistance.

The dependant variables of this experiment will most obviously be the resistance changing as the length does.

To make this a fair test there are certain control variables. These make the experiment a fair test. This involves keeping the same temperature of the wire. Heat on the atomic or molecular scale is a direct representation of the vibration of the...

Loading: Checking Spelling

0%Read more

### for this essay I investigated Ohms Law. I investigated the effect that the length and the thickness of wire had on the resistance.

1721 words - 7 pages Investigating ResistanceElectricity is the flow of electrons. Resistance is the slowing of this flow. Resistance will increase when there are more electrons for the current to collide with. It will also increase when the electrons are moving at a high speed. There are five main factors that affect resistance. These arei.Length of wireii.Temperature of wireiii.Voltage that is used to push current around...### 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...### Resistance of a Wire

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

1284 words - 5 pages METHOD- Set p the equipment as shown on the diagram.- One meter length of wire is fixed to a one meter ruler.- The first crocodile clip is clipped to the wire at the 0cm position on the one meter ruler.- The second crocodile clip is clipped to the 10cm position.- The power supply is turned on. The voltage and...### Resistance of a Wire

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...### Factors affecting the resistance of a wire

1216 words - 5 pages Factors affecting the resistance of a wireIntroduction:Resistance is a force, which opposes the flow of an electric current around a circuit.Resistance is measured in Ohms. George Ohm discovered that a circuit sometimes resists the flow of electricity. He called this 'RESISTANCE.' He even came up with a rule for working out the resistance of a circuit, which was:R= V ÷ IV- VoltsI-...### An investigation into how the diameter of a wire affects its resistance

2872 words - 11 pages Skill area P: PlanningWhat I am going to investigate is how the diameter of a wire affects the resistance of the wire.I plan to change the diameter of the wire.In order to keep it a fair test I will need to keep the following things the same:-The same voltage of electricity entering the circuit (I used 6V)-The length of the wire-The temperature-The type of wireI have identified some...### 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....### Physics (Resistance Of A Wire) Plan

980 words - 4 pages What affects the resistance of a wire Planning for the SC1 Introduction: In this experiment I will be investigating how length affects the resistance of a wire. This means I will be taking readings from an ammeter and also a voltmeter at different lengths of a wire. It will be powered by a power pack in which I will change the voltage to get different results.Aim: The aim of this experiment is to find out what affects the resistance of...### 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...### 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...## Investigating How Different Lengths of Wire Affect the Resistance in a Circuit

**Length:**944 words (2.7 double-spaced pages)**Rating:**Excellent

**Open Document**

Investigating How Different Lengths of Wire Affect the Resistance in a Circuit Hypothesis: I predict that; the longer the wire, the more resistance there will be. So if the length of the wire were to double, so would the resistance. The reason for my prediction is: The flow of electrons is called a current, the electrons are constantly hitting atoms, which causes resistance. If the same amount of current is passed through a longer piece of wire, there will be more collisions, hence more resistance. The more resistance there is, the more volts would be needed to push the current around the circuit, so the longer the wire, the higher the current. I can check the voltage, current and resistance to prove that my hypothesis is correct by using ohms law which is V=I*R (V=volts, I=amps and R = resistance). I can re-arrange this formula to find the resistance by saying R=V/I, so when I record my results, I should divide the volts by the current to give me the resistance. The voltage and the resistance are directly proportional. Equipment: A voltammeter. An ammeter. A thin piece of wire attached to a wooden ruler. Connecting wires with crocodile clips. A power pack. Method: Step 1: I will set up a circuit with a power pack, a voltammeter, and an ammeter. Step 2: I will attach a piece of thin wire to a meter long ruler. Step 3: I will have one plastic coated wire fixed to where the thin wire is at 0cm on the meter stick. Step 4: I will then crocodile clip the other plastic coated wire to my first chosen length on the thin wire which is attached to the meter stick. Step 5: I will record the length, the reading on the voltammeter and the reading on the ammeter, and then work out the resistance, using ohms law (dividing the volts by the amps). Step 6: I will then repeat this using different lengths each time, and ## How to Cite this Page
| Length | Color Rating | |||
---|---|---|---|---|---|

How Thickness and Length Affect the Resistance of a Wire Essays - How Thickness and Length Affect the Resistance of a Wire I plan to investigate how the length and thickness of a wire affects the resistance. I plan to do this by keeping the voltage the same by using a variable resistor and measure the current when varied lengths and thicknesses of wire is in a circuit ===================================================================== Variables ========= There are a few factors that can affect the resistance. These are; * Temperature * Thickness * Length * Material I plan to change the length of nichrome wire at intervals of 10cm's.... [tags: Papers] | 1497 words (4.3 pages) | Better Essays | [preview] | ||

Investigating How Length and Width of Copper Wire Affect the Current of a Circuit - Investigating How Length and Width of Copper Wire Affect the Current of a Circuit Task: To investigate how length and width of copper wire affect on the current of a circuit. Prediction: In this experiment, the input variable will be changing the length of the copper wire used in the experiment, and also the SWG of the wire, which means the width of the wire. By changing this variable, the current the circuit will vary. With my knowledge in science and some research on the factors that affect a circuit's resistance.... [tags: Papers] | 1172 words (3.3 pages) | Strong Essays | [preview] | ||

Essay about Investigating the Factors that Affect the Resistance of a Wire - Investigating the Factors that Affect the Resistance of a Wire Aim: My aim is to find out how the length affects the resistance of a wire. Safety: § I should not leave the power coming from the batteries on the wire for too long as this will cause heating and might burn. § Be careful when touching the wire, as it may be hot. § I should just leave the batteries connected to the wire only for a short time, as I only need to take a reading and take it off. § I should be careful when cutting the wire.... [tags: Papers] | 1106 words (3.2 pages) | Strong Essays | [preview] | ||

Factors Which Affect the Resistance of a Wire Essay - Factors Which Affect the Resistance of a Wire To start off this experiment I feel that it is suitable to explain the main facts of this study. Below is a section explaining the resistance in detail. Facts on Resistance: I have shown how resistance occurs. Â· WIRE Â· ATOMS Â· ELECTRONS Resistance occurs when the electrons traveling 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.... [tags: Papers] | 1487 words (4.2 pages) | Strong Essays | [preview] | ||

Essay on Investigating What Factors Affect the Resistance of a Wire - Investigating What Factors Affect the Resistance of a Wire For this investigation I am going to investigating a factor which effects resistance of a wire. Resistance is measured in ohms (Î©). It is a measure of how hard it is to move current through a component, it occurs when electrons travelling along the wire collides with the atoms of the wire. To choose a factor to measure I will make a list of the factors I could investigate and decide which one is best for me to investigate.... [tags: Papers] | 1107 words (3.2 pages) | Strong Essays | [preview] | ||

An Investigation to Discover Factors That Can Affect The Resistance of a Wire - An Investigation to Discover Factors That Can Affect The Resistance of a Wire Aim I shall be investigating factors that can affect the resistance of a wire. The possible variables I could choose are Length, Thickness, type of metal, Shape, Temperature and Density of Metal. I will choose Length because I can choose from a free range of lengths and can get many different readings, to create a final graph at the end of my investigation. I will not choose thickness because the wires only come in set thicknesses and do not go up in a uniform rate, so I would not have a free range to choose from.... [tags: Papers] | 2350 words (6.7 pages) | Strong Essays | [preview] | ||

Investigating Resistance in a Circuit Essays - Investigating Resistance in a Circuit Prediction Resistance makes it harder for the current to flow in a circuit. Resistance occurs when the free electrons collide with the atoms. The greater the resistance is, the smaller the current will be. Resistance is measured in ohms (Î©). To work out the resistance of any given voltage, we must use Ohm's Law. Ohm's Law states that the current through a metallic conductor, like a wire, is proportional to the potential difference (Voltage), when at a constant temperature.... [tags: Papers] | 602 words (1.7 pages) | Strong Essays | [preview] | ||

Resistance of a Wire Essay - Resistance of a Wire I predict the length of the wire will affect its resistance. I have based this prediction on the free electron theory. It considers that there are electrons on the outer shell of a metal are free to move at random. A piece of metal also has fixed ions, which are positive. These ions are said to be in a sea of electrons, which are negative. A wire also has these properties as it is made of metal. To the right is a diagram of a greatly magnified piece of wire. When a voltage is applied to the wire the negative electrons are attracted to the positive side of the wire.... [tags: Papers] | 1311 words (3.7 pages) | Strong Essays | [preview] | ||

Resistance of a Wire Essay - Resistance of a Wire We all know that current is the flow of electrons through an electrical circuit (the electrical charge), but before the electrons flow through the circuit, a voltage (or potential difference) must be applied. This provides the "pressure" to push the electrons forward. A battery for example would give a potential difference to a circuit and provide the force to begin the flow of electrons through it. Resistance is measured in Ohms (W). It is anything in the circuit that opposes the flow of an electrical charge.... [tags: Papers] | 1488 words (4.3 pages) | Better Essays | [preview] | ||

Resistance of a Wire Essay - Resistance of a Wire Planning: I am going to design an experiment to measure how the length of the wire affect the resistance in the wire. I will use the same wire for all my measurements. It is important to have a fair test, so the cross-sectional area of the wire must be the same for all measurements because as the cross-sectional area increase the resistance decrease. It is also important to have the wire made of the same material because different materials have different resistance, nichrome is the good conductor of electricity .The temperature also affect the resistance because when it increase the resistance in the wire increase.... [tags: Papers] | 555 words (1.6 pages) | Strong Essays | [preview] |

### Related Searches

Wire Affect Lengths Circuit Meter Pack Thin Stick Step Repeat Voltage

recording my results in a table.

Here is a diagram of what the experiment should look like:

Fair test

To keep this Investigation fair I must make sure that: the cross

sectional area on each different length wire is the same, as the

thickness of a wire effects the resistance and therefore would make my

results inaccurate. I must also ensure that the material of each wire

is the same as different materials can also affect resistance. The

temperature of the wire must be kept the same, as temperature affects

resistance, I can ensure that the wire is kept at the same temperature

by using a thermostat. The source of energy and set up of the circuit

must be kept the same throughout each experiment. To ensure that my

results are accurate I will repeat each experiment 3-4 times.

Safe test

When dealing with electricity it is important to take some safety

precautions. To keep safe whilst doing the Investigation, water and

liquid substances should be kept away from the experiment, as water is

a conductor of electricity, and if spilt could result in accidents. If

a current is running through a small wire, the wire could over heat,

so the bare wire should there-for not be touched whilst the current is

running through.

Results:

Try 1

Length

Volts

Amps

Resistance

5 cm

0.75

1.29

0.58

10 cm

0.92

0.79

1.16

15 cm

1

0.6

1.6

20 cm

1.44

0.5

2.88

25 cm

1.33

0.67

1.99

30 cm

1.48

0.58

2.55

35 cm

2.33

0.46

5.07

40 cm

1.5

0.45

3.33

45 cm

1.55

0.43

3.6

50 cm

2.32

0.34

6.82

Try 2:

Length

Volts

Amps

Resistance

5 cm

1

1.24

0.81

10 cm

0.96

1

0.96

15 cm

1.3

0.7

1.86

20 cm

1.5

0.56

2.68

25 cm

1.55

0.57

2.72

30 cm

1.49

0.55

2.71

35 cm

1.45

0.54

2.69

40 cm

1.5

0.43

3.49

45 cm

2.35

0.49

4.8

50 cm

1.65

0.45

3.67

Length

volts

amps

Resistance

5 cm

0.96

1.84

0.57

10cm

1.15

1.25

0.96

15 cm

1.19

0.8

1.53

20 cm

1.34

0.75

2.31

25 cm

1.44

0.7

2.13

30 cm

1.47

0.61

2.43

35 cm

1.71

0.53

3.29

40 cm

1.54

0.48

3.2

45 cm

1.78

0.47

3.8

50 cm

1.8

0.42

4.44

(All numbers have been rounded to 2 decimal places.)

Graph:

Analysis: I can see from my graph showing the average resistance in

relation to the length of each wire, that there is a strong positive

correlation between the length and the resistance in a wire. The

longer the wire, the higher the resistance. This proves my hypothesis

correct. All my points are close to my line of best fit, showing no

abnormalities or major exceptions to this theory. However from my

individual results tables you can see that the resistance did not

always increase with the length. For example on my first try of

results, 20 cm had a higher resistance than 25 cm, and 35 cm had a

higher resistance than 40 cm and 45 cm. I can't find any obvious

reasons for this, and these minor hitches in results occur throughout

all of the tries .Unfortunately a thermostat was not available for our

experiment so the temperature may have varied, which could be one of

the reasons that the resistance was occasionally higher in the shorter

wire, as heat raises resistance. After looking at the results of the

averages, I can see that 35 cm had a higher resistancy than 40 cm, I

do not understand that why on average, that was the case, although it

was by only a small amount (0.6) and may have just been a fault whilst

doing the experiment or the heat of the wire may have changed

significantly from 40 cm to 35 cm, increasing the resistance. Apart

from these minor defects, the results were as I expected, and I am

satisfied with the out come of the experiment.

Evaluation: Although I was pleased with my investigation, if I were to

do it again I would use a thermostat as it would improve the accuracy

of my results. I would have also liked to have investigated into the

ways in which the thickness of a wire, the different materials and the

different temperatures affected the resistance, as I think it would

have been interesting to have then compared them and seen which

qualities affected the resistance the most. although I understand that

there was not enough time on this particular occasion. Overall I

understand how and why I got my results, and have the evidence to back

up my prediction which was "The longer the wire the higher the

resistance" and by looking at my results table and graph you can tell

this is usually the case. I think if I was given the chance to do this

experiment again, I would take it more times than 4, as it would give

me a more definite piece of evidence to back up my prediction, and I

may find out a more subtle trend or pattern in my results.

## 0 thoughts on “Length Of Wire Affects Resistance Coursework”