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Arrows on the brain

I'm sure that when I try to go to sleep tonight I'm going to have arrows rotating inside my head. Well when you've gone to the trouble to make one arrow you might as well make many. I'm quite pleased with the result, can't wait until  we do magnetic fields again next year. I'd never really noticed before that all these questions we ask about currrent carrying conductors in perpendicular B fields are all exactly the same question viewed from a different side.

Tags: Flemings LHR

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