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Elizabeth Stephens 11N Physics Coursework How does the length of wire affect resistance? Aim To find out how changing the length of wire will affect the level of resistance when current flows through it. What is Resistance? Current is a flow of electrons. As they travel down a wire there is a force acting against them, this is Resistance. Resistance is caused by two factors even 1. Positive nuclei in the wire. The positive nuclei attract the negative electrons and deflect them from travelling in a straight line. This means the electrons travel a much larger distance to go the same length through the wire and take longer. 2. The vibration of the positive nuclei in the wire. The positive nuclei vibrate at any temperature above absolute zero. The vibrations mean the nuclei move around and this causes more frequent deflections. This makes the journey of the electrons slower. The longer the wire, the higher the resistance because...

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