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I've taught several Physics courses over the years, often to students who are working towards a Degree course. The leap from GCSE to A-Level can be daunting for some and, at the very least, there are a lot of new concepts and definitions to get to grips with. Sometimes, injecting some humour into proceedings by visualizing an idea in an unusual way can stimulate class discussions and help lodge facts in the long-term memory. So, here is a policeman (UK-style) and a charging rhino, helping to depict the definition of Electric Field Strength! :-)
