Physics Coursework Theory - The resistance of a wire.

Theory behind my experiment Thickness (cross sectional area of the wire), length, and temperature all have some effect on the amount of resistance created in a wire. Another factor is the conductivity of the material we are using. Some metals are just more electrically conductive than others. As long as I use the same type of metal for each wire, my experiment will remain fair. Cross Sectional Area The thicker the wire, the less resistant …

…the wire This is easier to explain using the "hallway" analogy. Imagine in a corridor, there are some people (electrons) trying to move, and there are some people (ions) staying still. If the corridor was very short, there is a high chance that the "electrons" will make it to the end. If the corridor is very long, there is more chance of the "electrons" colliding with an "ion" and therefore decreasing the amount of current.