Resistance and Length of a Wire I will test different lengths and areas of the wire and observe and record the resistance. I will see how these variables affect resistance, which length or area of ​​wire gives the least resistance and which gives the most. In my preliminary experiment I will vary the length of the thread I use. Varying the length Scientific knowledgeResistance is a force that opposes the flow of an electric current around a circuit so that energy is needed to push the charged particles around the circuit. The circuit itself can resist particle flow if the wires are very thin or very long. For example, the filament through an electric light bulb is quite thin as it must resist the flow of particles for the bulb to light up. The higher the resistance, the higher the voltage needed to push a current through a wire. Resistance occurs when electrons traveling along the wire collide with atoms in the wire. These collisions slow the flow of electrons, causing resistance. Resistance is a measure of how difficult it is to move electrons through the wire. Resistance is measured in Ohms. Ohm's law states that the current flowing through a metal wire is proportional to the potential difference across it, provided the temperature remains constant. Ohm's law (V=I/R). This means that for a certain current there will be a higher voltage across the wire if it has more resistance. Therefore voltage measures the amount of energy consumed to pass each coulomb of charge through a wire. The units of measurement for voltage are the same as joules per coulomb. A metal wire can conduct electricity because the outer electrons of the atom are free to carry a charge. An electron is part of a negatively charged and almost massless atom. The more free electrons a metal has, the better the conductor. Resistance/Length Predictions I think that as the length of the nichrome wire increases the resistance will also increase.