| EDDY CURRENTS
consists of a strong electromagnet through which visitors can drop
different discs. Some discs fall freely through the magnetic field
while others fall slowly. The magnetic field induces eddy currents
in the discs and these currents are magnetic, so although none of
the plates are made of magnetic materials, the plates which are
electrical conductors are often affected by the magnetic fields.
Conductors which have been slotted, so as not to allow the creation
of eddy currents, also fall straight through the magnetic field.