|MadSci Network: Physics|
I know how a conductive disk (pie pan), made from such materials as aluminum or copper, can be levitated above a powerful AC electromagnet. But can the disk be replaced by another coil, which is short-circuited, (to create closed loop) and has many windings for large impedance to limit the induced current? Now, instead of many isolated eddie currents forming, a single current should be induced. Yet I don't know if stability, and therefore levitation, can still be achieved. And now for my real question: If it's possible, would the levitation force be greater (i.e., able to bear more weight) because the single current generates a larger counter magnetic field than does the eddie currents? Also, depending on your answer, I might attempt this experiment; any advice? Especially on what frequency the primary AC electromagnet should operate on (I'm hoping 60 Hz will work because I can adjust and get up to 13 kilowatts out of my stove and oven).
Re: Can a closed coil be levitated above an AC electromagnet?
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