Resitances of a wire:it is about how length effects the resistance of a wire.

Resistance in a wire Planning - The resistance of a wire can be affected by certain factors: Length of wire Cross sectional area resistivity (type of metal) Type of wire Temperature I chose to investigate how length affects the resistance in a wire. This means that the other factors (variables) must be controlled. This means I must keep the same type of wire, the same material of wire (a preliminary experiment will help determine this), …

…would use a longer length of wire to see if the graph of resistance changes from a straight line with a much longer length of wire. I would also investigate another factor, such as diameter of the wire. I predict that if I did investigate this, when I increased the diameter the resistance would decrease. I would also do the experiments under different conditions such as temperature to see the difference this makes to resistance.