There is a resistance to the flow of an electric current through most conductors. The resistance in a wire increases and the thickness of the wire decreases. By increasing the length, the resistance can be increased. When you increase the excitation by increasing temperature, the resistance increases.
If resistance happens as the result of the collision between charge carriers and the atoms of the wire, and then there is likely to be more collisions in a longer wire. More collisions mean more resistance. Also, the cross-sectional region of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area. Also, the material the wire is made of affects resistance.
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