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October 2, 2014

Homework Help: Physics

Posted by Justin on Thursday, February 10, 2011 at 6:42pm.

Suppose a straight 1.25 mm diameter copper wire could just "float" horizontally in air because of the force of the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.00 multiplied by 10-5 T. What current would the wire carry?

I want to use the formula F=IlBsin(theta); but am confused as to what F would be, what does just "float" horizontally imply?

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