The Magnetic Field Demonstrator comprises a set of four transparent plastic plates (153mm x 76mm x 6mm), each plate has a matrix of 98 (14 x 7) small circular chambers, each chamber containing an iron rod and functioning effectively as a plotting compass
The plates may be arranged in various ways, e.g.as a single large two dimensional surface, as faces of a cube etc
This way they may be used to show configuration of a magnetic field in one or two dimensions
The transparent nature of the plates also make them suitable for use on an overhead projector
