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

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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

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Middle

Results

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

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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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