What affects the resistance of a piece of wire-Analysis

The second part of my prediction-The resistance will be proportional to the length was not obvious from my results table so I drew two graphs-Length against amps and length against resistance. The first graph showed a curved line -meaning that the length of the wire is not proportional to the amps. But the second graph was a straight line showing that the length of the wire is proportional to the resistance so the second part of my prediction was also correct.

My prediction is right and I have collected enough evidence to support it well

Conclusion

As the length of wire increases the resistance increases proportionally-This is because If the length of wire doubles then there are double the amount of atoms of that material for the electrons (carrying the electrical current) to collide with. Each time the electrons collide with the atoms of material they lose some of their energy so by the time they come out the other side of the resistor they only have half of their original energy

This means that double the voltage is needed to push through the same amount of current. And as the same voltage is being used each time not as much current is being pushed through.