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Two identical coaxial coils of wire of radius35cm are directly on top of each other, separated by a1-mm gap. The lower coil is on a flat table and has a currentiin the clockwise direction; the upper coil carries an identical current and has a mass of0.054kg. Determine the magnitude and the direction that the current in the upper coil has to have to keep the coil levitated at its current height.

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