The aim of this experiment is to investigate how a change in the length of wire made from nichrome will affect the potential difference (voltage) and the current across that length, hence affecting the resistance.

... PHYSICS INVESTIGATION INVESTIGATING THE RESISTANCE OF A WIRE AIM: The aim of this experiment is to investigate how a change in the length of wire made from nichrome will affect the potential difference (voltage) and the current across that length, hence affecting the resistance. Introduction: Resistance is the opposing force to the current in a circuit. The unit of resistance is the ohm (?). The electrical resistance of a conductor is defined by: R (Ohms) = Where I is the current flowing through the conductor when the Potential Difference across it is V. The ohm is defined as being: " The resitance of a conductor through which a current of one ampere is flowing when the PD across it is one volt, i.e. 1? = 1VA-1" Some conductors have resistances which depend on the current flowing through them, but the majority of conductors, notably metals, depends entirely on their physical condition. There are four factors which affect resistance in

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