Nova Hot Plate NH-3403-1, Single Brand Nova Type Hot Plate Model NH-3403-1 Power 1500W, 220-240V. 50/60Hz Nova Single Electric Hot Plate Instead of by thermal conduction from a flame or an electrical heating element. For nearly all models of induction cooktops a cooking vessel must be made of or contain a ferromagnetic metal such as cast iron or stainless steel. Copper glass and aluminum vessels can be placed on a ferromagnetic interface disk which functions as a conventional hotplate. In an induction cooker a coil of copper wire is placed under the cooking pot and an alternating electric current is passed through it. The resulting oscillating magnetic field induces a magnetic flux producing an eddy current in the ferrous pot which acts like the secondary winding of a transformer. The eddy current flowing through the resistance of the pot heats it.