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This lesson covers the Required Practical on investigating how the length of a wire affects its resistance, as specified by AQA GCSE Physics (4.2.1). This is Required Practical Activity 15 and is one of the most frequently examined practicals in the electricity topic.
To investigate how the length of a wire affects its resistance.
The hypothesis is that as the length of a wire increases, the resistance increases proportionally. This is because a longer wire provides more opportunities for the charge carriers (electrons) to collide with the metal ions in the lattice.
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