Assume a straight 2 millimeter diameter copper wire could


Assume a straight 2 millimeter diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.1×105 T.

a) Estimate what current would the wire carry?

b) Explain briefly why it is not feasible?

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Physics: Assume a straight 2 millimeter diameter copper wire could
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