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In my investigation I intend on finding out the resistance of a metal wire.

Extracts from this document...

Introduction

Scott Davies

Physics Investigation

What I intend on doing?

Middle

Obtaining information

During the experiment I collected three sets of results so that an average can be worked out for a single more accurate set. Each set of results contains length (CM), voltage and current (I), with these I can then work out the resistance for each length. I used 2 different types of ammeters one with numbers going up in single units and one going up in decimals to get accurate and precise results.

Resistance = voltage/current

Conclusion

My conclusion has supported my prediction 100%.

Evaluating information

Everything went as I suspected even the odd result that I obtained at 10cm of wire, I think the odd result was because 10cm of wire was to short so it started to heat up causing the metal ions to vibrate making it harder for the electron to pass through. But the other thing is that the experiment only goes up to 90cm this was because I needed to tape the wire on the ruler so this took up space, it was due to the planning it is something that could have been improved, but knowing what I know now a simple way to work out 100cm is to take the resistance at 50cm and multiply it by 2. To make this experiments analysis better I could have used different wire to prove my theory correct.

This student written piece of work is one of many that can be found in our GCSE Electricity and Magnetism section.

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