wg48temp9 - 9-9-2019 at 01:45
I was attempting some mild heating in a stainless steel lid of a storage jar on an induction hob. I was preparing eggs for my breakfast LOL.
I had covered the lid with a piece of aluminium foil. The foil lifted with a burst of steam. I thought I had over heated the egg but it was not cooked
yet. I replaced the foil and in a few seconds it lifted and slipped off again. Eventually I weighted the foil down with a spoon.
I realized the foil floated each time the induction hob pulsed on (low power is achieved by pulsing the 20kHz induction field every few seconds). Its
possible to hear when the hob pulses as it produces a buzz on each power pulse. I thought the floating was odd as aluminium foil does not normally
float on the hob.
I suspect the stainless steel was acting like a shaded pole which in combination with the hobs magnetic filed produced a vertically moving field that
levitated the aluminium foil.
Obviously some experiments are required to see if I can enhance the effect.