All conductors of electricity have a certain amount of resistance, but some conductors are better than others are. The bigger the resistance is, the harder it will be for an electric current to flow through the wire.

The aim of this investigation is to investigate what effect is given on the length of a wire, when the length of the wire increases.

In this experiment, I predict that if the length of the wire increases, then the resistance will increase, in proportion to its length. I think this because the longer the wire is, the more atoms will be contained within the wire. Therefore it is more likely that the electrons are going to collide with the atoms, because there are more atoms in the wire to provide a force to prevent the electrons passing. This must mean tha

We will use a small voltage and current because we have found out if the wire becomes to hot, this can affect the rate of resistance and would make this experiment unreliable. This happens because when the electrons move the have energy which they pass onto the atoms when they come into collision with them. The energy from the collisions makes the atoms vibrate more (the meter gets hotter) making the atoms more likely to stop the electrons from passing (it’s resistance goes up). We found this out from carrying out a practical experiment on the characteristics of a bulb. We couldn’t make the supply voltage too small, as our meters would not have been able to record the results because they wouldn’t have the sufficient accuracy to record the results

Some topics in this essay:
Diagram Method, , Experimental Detail, Clips Five, length wire, crocodile clips, wire increases, length wire increases, resistance wire, power supply, proportion length, Power Supply, Ammeter Voltmeter, increases resistance increase, metre rule, direct proportion, increases resistance, wire length, wire increases resistance, increase direct proportion, wire length wire,