large scale electromagnetic hover sculpture... HELP!! [really quite urgent...] Hi all!! i'm a design student, trying to find out about the feasibility of a project i'm working on... the concept goes like this: a "bowl" structure, lined with electromagnets, all with the same polarity facing towards the centre of the bowl, levitates a large chrome-finished ball (built as light as possible from perhaps fibre-glass or any other light-weight material, to lessen the load on the mechanism), within which is magnet/electromagent constructs which give the object an opposite polarity, which brings me to my first question: 1. is it possible to have entirely a single polarity on an magnetically charged object? either negatively or positively... if it is impossible then... a second concept involves a cable running from the base of the ball to the base of the bowl, holding it while its negative pole is on the underside of the ball, repelled by the positive pole facing up at the bottom of the bowl, but held in place by the cable. theoretically i think is is quite sound... i hope. 2. is this feasible? and, 3. if so, what kind of power drain would be needed to power such a construction? would it be feasible as a sculpure? 4. is there a magnetic-field retardant material that could force the field to not radiate off the side of the sculpture, possibly ripping zips and gold teeths off unsuspecting viewers? 5. how big would the magnetic field be if one of this magnitude was constructed? with shielding? without shielding? a professor in physics informed me about the concept of an induction coil, where a coil is twisted in such a way that the topmost last turn is REVERSED, and that, he says, creates a zone of zero force (or something similar) in the centre of the coil, where a metallic object (non-magnetic) may be levitated. 6. is an induction coil feasible on such a large scale? and its implications? power drain? thank you so much for enduring throught this rather long problem, any any any assistance that you may offer would be rewarded with my eternal gratitude! it is rather urgent, too... thank you again, and in advance!