Before commencing my investigation, I have taken into consideration several factors, which will affect the resistance of a piece of wire. I will gradually work through these particular factors in my preliminary experiment, to eliminate erroneous parts of the investigation to make the final results that I will eventually obtain, more reliable.

Resistance occurs when the electrons travelling along the wire collide with the atoms within the wire. These collisions slow down the flow of the electrons, causing resistance. Resistance is a measure of how hard it is for the electrons to flow through a circuit. In this particular case we are measuring how the resistance of a piece of wire is affected.

• Temperature: if the wire is heated up this will increase its resistance. The reason being is, when the temperature increases, the atoms in the wire will begin to vibrate more vigorously because of the increase of energy. This means that the electrons will have much more difficulty in passing through the wire, as they will end up colliding with the charged atoms.

During the investigation it will be difficult to k

During my preliminary work I will do my best to repeat my experiment at least twice. I also have to make sure to keep the temperature of the wire at a constant level, and by using a variable resistor I will control the current where necessary at 0.1A (amps). At intervals of 15cm (15, 30, 45, 60, 75, 90) I will record the results that I gain and produce a set of Averages for the resistance of the wire.

• 1: Firstly I will connect up the circuit with afore mentioned apparatus.

Some topics in this essay:
Length Wire, Britannica Evaluation, Ammeter Resistance, Resistance Length, , Diagram Method, Preliminary Conclusion, Ohms Safety, Table Length, Strip Nichrome, piece wire, length wire, resistance , temperature wire,  0, atoms wire, resistance  0, anomalous results, length cm, cm voltage ammeter, resistance wire, cm voltage, voltage ammeter resistance, table length cm, length cm voltage,