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OpenStudy (anonymous):
Suppose a straight 1.00-mm-diameter copper wire could just “float” horizontally in air because of the force due to the Earth’s magnetic field, which is horizontal, perpendicular to the wire, and of magnitude 5.03*10^-5T .What current would the wire carry? Does the answer seem feasible? Explain briefly. (ρCU = 8.9*10^3Kg/ m^3).
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