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In this experiment we have been asked to find out whether the length of wire in the circuit will effect the resistance..

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Introduction

Graham Heslop

Physics Coursework

In this experiment we have been asked to find out whether the length of wire in the circuit will effect the resistance..

Hypothesis

At this point in time I predict that as you increase the length of wire the resistance will increase. I think this because there is more particles in the wire for the electrons to move around in and rebound off.

Preliminary Test

The preliminary would determine what decisions I would make in regards to the main test. Before I could do

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Middle

        First of all I tried the wire at 5cm. I could see that the wire was overheating too quickly so I then made the wire 10cm. This being the smallest possible length I could use without the wire heating up. We came up with maximum length because if we went any higher than this the readings we were receiving were small and not at all accurate. The wire we decided on using was SWG 28 as this had optimum width and thickness. It wasn’t
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Conclusion

        We made it a fair test by using the same diameter of wire each time and by using exactly the same wire each time. Also we used the same metre ruler and as well as that we used the method of attaching the wire to the ruler using tape.

Diagram

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Conclusion

 From the results I have accumulated I have come to the conclusion that length infact does effect the resistance of the wire. My mean results table shows this

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