• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

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?

In my investigation I intend on finding out the resistance of a metal wire. I will also be doing the same experiment three times so that it will eliminate any odd results, the variable will be the length of wire and the voltage will be the same throughout the experiment to make it a fair test.

I’ve also done some research to find out which length of wire will be more useful and I have chosen nichrome due to that the equipment in the laboratory will not be able to read the data on the other metals because the data will be more than 3 significant figures.

Here is a diagram of the apparatus

image00.png

Resistance is how easy or hard it is for a flow of (in this case) electrons to pass through a metal wire, so I will investigate different lengths of wire to see how the resistance varies.

...read more.

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

...read more.

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.

...read more.

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

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work