How to test the resistance of the wire

This is for a school project and needs to be at GCSE standards, no more advanced than that please!

I conducted an experiment on the resistance of a wire, measuring the voltage and the current on a circuit with a metre long wire and shortening the wire and repeating the experiment until I had all the data I needed. I then used Ohm's law to calculate the resistance of the wire at different lengths and I am currently writing up a conclusion.

However to achieve a higher grade I need to mention a different experiment I could perform to get more reliable data, and that's what I'm asking, what similar yet more reliable practical could I perform in order to get similar results to back up my conclusion (of course, this is hypothetical so I don't need too much detail).

Thanks in advance

-Cryson

Actually it is very difficult to measure the resistance of a wire accurately, unless you are familiar with 4 terminal type measurements.

So that can be your different experiment, use of 4 terminal type measurements, which means the voltmeter contacts have to be totally separate from the ammeter contacts. Another alternative is to do this with a more accurate ammeter and voltmeter. Voltmeter connection to the wire should be a knife edge, so you know exactly where along the wire the measurement starts.

Other methods:
[1] use digital ohmmeter.
[2] use resistance bridge measurement.
[3] use this chart to calculate resistance
http://en.wikipedia.org/wiki/Resistance_…

using meter bridge , slide wire bridge , potentiometer...