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# An Investigation to show the change in resistance as the length of wire increases.

Extracts from this document...

Introduction

An Investigation to show the change in resistance as the length of wire increases

Introduction

I am going to investigate the change in resistance as I increase the length of wire. To keep this a fair test I am going to keep everything the same apart from the length of wire. Electric current is the movement of electrons through a conductor. In this experiment the wire will be the conductor. When resistance is high conductivity is low. Resistance is when the electrons, flow towards the positive from the negative and they collide with other atoms. They then transfer some of their kinetic energy. The transfer on collision is what causes resistance.

Prediction

I

Middle

Results

We have only recorded one set on results because we ran out of time and there wasn’t enough equipment.

Conclusion

class="c2">40

0.69

0.18

3.83

45

0.45

0.17

4.47

50

0.83

0.17

4.88

55

0.89

0.17

5.23

Evaluation

I could improve my set of results by either taking my time more and I could also do a wider range of tests and I could change I number of things like the length of wire or the thickness, the voltage etc. This would help with finding averages. During my experiment I encountered various problems with getting the current to stay the same throughout my experiment but we solved it in the end. This is why the current changes slightly half way between my results.

Conclusion

The results of my experiment show that I was correct with my predication that as the length of wire increase then so will the resistance in proportion to the length. My graph shows good strong positive correlation and I have a good line of best fit.

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# Related GCSE Electricity and Magnetism essays

1. ## I predict that as the length of wire increases, the resistance will also increase.

I will control different parts of the experiment in different ways. For one, the material that the wire is made of will be kept the same throughout the experiment so as to ensure a fair test. The cross-sectional area of the wire/ its thickness will also be kept the same.

2. ## Investigation to determine whether the resistance of a wire increases in proportion to its ...

Finally the factor that I will be investigating, the length of the wire. As the length increases the resistance increases. The length of the wire affects the resistance because all solids are made of atoms that are always vibrating. As the length increases so does the vibration.

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