On 02/18/2010 11:51 PM, Stephen A. Lawrence wrote: > > On 02/18/2010 08:39 PM, Harry Veeder wrote: > >> Naudin has posted two more videos where he holds the magnet away from >> the torodial coils so that the pickup coil is between the magnet and >> the toroidal coil: >> >> http://www.youtube.com/watch?v=2Nd9IuVJ3ww >> >> and with a nanocrystalline alloy for the core: >> http://www.youtube.com/watch?v=AdEd8jX0fZA >> >> This time the current drops when the magnet is brought closer. >> > Haven't had time to look at these yet; will do that tomorrow. >
Finally got around to looking at them. I don't know how much they show, since it's square-wave AC current being measured with a simple averaging meter, but they sure are funny! Love that first one, where he's reading the current through the coil directly. When you're lighting a light, of course, the current should drop .... er, say what?? Since the last time I expressed an opinion about this in this forum I've thought about it some more and consequently gotten more confused. If I ever can cut through the confusion I'll post the conclusions...
