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Physics 13 Online
OpenStudy (anonymous):

Suppose a straight 1.10mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B⃗ , which is horizontal, perpendicular to the wire, and of magnitude 6.5×10^−5T . What current would the wire carry? I=_ A Does the answer seem feasible, yes or no?

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