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Experiment to investigate the resistance of a wire Introduction and planning: Electrons move through when a p.d. is applied. The opposition of a conductor to current is called its resistance. Resistance is measured in ohms (?). Flow of electrons is called current. Voltage is the force, which pushes the current round the circuit and the resistance opposes it. This means that there is a relation between these three. Current decreases when resistance increases. This is Ohm's law. V=IR Therefore R=V/I A resister has the resistance of one ohm if a voltage of one volt is requires to push the current of one amp through it. If the electrons travelling along the wire collide with the atoms of the wire, resistance occurs. Since flow of electrons slows down because of these collisions therefore resistance increases and current decreases. According to these rules, there are few factors, which can affect the resistance. Length of the wire...

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