23 (b) Current is a flow of charge carriers called electrons. The electrons collide with ions in the wire. Explain the shape of Sammy’s graph, and use kinetic theory to explain why the resistance changes. The quality of written communication will be assessed in your answer to this question. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [6]
Š OCR 2015
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