resistance in wires

Investigate how the resistance of nichrome wire depends on its length


Hypothesis

I predict that the longer the length of wire, the higher the resistance will be. This is because resistance is caused by Electrons colliding with atoms in the wire therefore, the longer the length of wire, the more atoms there will be so it is more of a struggle for electrons to get around the circuit without any collisions.

The reason for these collisions is that in a longer piece of wire, there are more free electrons in the actual atoms of the wire that can carry electricity. In a short wire there are less electrons. This means less collisions and a lower resistance

I also predict that the rate, at which the resistance of the wire increases, will be directly proportional to the increase in length. This is because, when the length of the wire is increased the number of collisions the electrons, carried by the current makes, with the atoms also increases and therefore results in an increase...