... magnet. The machine is connected by inserting upper and lower bracket plate and risers. Several small rotatable fingers are riveted on ... Three-dimensional Magnetic Induction Line Demonstrator 1, Bar Magnet, 2, Bracket Plate, 3,Riser, 4, Horseshoe MagnetTheoryWhen you put a permanent ... risers, five pieces of small risers, upper and lower bracket plates and horseshoe magnet.1.2.2 Assemble the raised ...