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Problem: We aim to find out if there is a relationship between the length of the resistance wire and the value of resistance by using different lengths of resistance wire. Background knowledge Wires that don't let much current pass through them are called resistance wire. Resistance wires are used to control the amount of current flowing through a circuit-resistance is measured in ohms (). Some wires are more resistant that others e.g. nickrome and constantan. This is due to the arrangement of the atoms in the wire; the atoms are arranged so that it is more difficult for the free electrons to move through it therefore electric current cannot flow as well. Also resistance wire tends to heat up, as the free electrons need more energy to move through the wire. To find resistance we use the equation: Resistance = voltagecurrent or R= VI If a graph of voltage against current is a straight line...

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