When an emf is generated by a change in magnetic flux according to Faraday's Law, the polarity of the induced emf is such that it produces a current whose magnetic field opposes the change which produces it.
The site allows the path of a charged particle to be tracked through a magnetic field perpendicular to the screen. A bit like a fine beam tube. I didn't find this site easy to use. The hypertext needs to be used to find out what to do. Put the pointer
Not just the MagLev train in depth, but lots of links to diamagnetism and levitation also to a web page on anti-matter page. In all this is a very stimulating site!
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