Although they seem to have become almost totally obsolete, I have always loved the shape of the coils that steer electrons to make the image in Cathode Ray Tube televisions. So some students ran a DC current through one and made some maps from it. Can you confirm the resulting field as an expected result from Ampere's Law AND can you explain why the tube designers wanted a B field with such a funny shape?
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Students Investigate Magnetic Field of CRT Television Electron Steering Coil |
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| Education | Upload TimePublished on 20 Dec 2013 |
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