GCSE Physics SC1An experiment to investigate how the electrical resistance of a wire changes in relationship to its length- preliminary

Prediction:

I think that as the length of the wire increases so will the electrical resistance. Also I predict that my graph may have a strong positive correlation. I will also try to incorporate the equation y = m x + c. This will help me to find out the gradient of the graph. I predict that my graph my look something like this:









Apparatus:
 Power pack
 Ammeter
 Voltmeter
 Wires
 Metre rule with nichrome wire in following thickness’:
1. 0.315 mm
2. 0.375 mm
3. 0.457 mm
4. 0.559 mm
 Crocodile clips

Preliminary Method:

I set up the experiment as follows:












Aimée Fitzpatrick 10a

I set my ammeter up in series and my voltmeter up in parallel. Then I then turned on the power pack, after my teacher checked my experiment to make sure it was safe, and changed that dial so that the voltmeter was at 2 volts. This was kept constant throughout the experiment. The only thing that I cha...