Why is the following situation impossible?

+2 votes

Why is the following situation impossible? Imagine a copper wire with radius 1.00 mm encircling the Earth at its magnetic equator, where the field direction is horizontal. A power supply delivers 100 MW to the wire to maintain a current in it, in a direction such that the magnetic force from the Earth's magnetic field is upward. Due to this force, the wire is levitated immediately above the ground.

asked Feb 19, 2012 in Physics by Joey33 ~Expert~ (1,216 points)
    

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