if we wish to support it by magnetic repulsion

Posted on 2014-01-08 14:46:00 in Physics by FRANK

A long horizontal rigidly supported wire carries current i_aof 100 A. directly above it and parallel to it is a fine that carries a current i_bof 20 A and weighs 0.073 Nm^-1. How far above the lower wire could the second wire be kept if we wish to support it by magnetic repulsion? µ₀ = 4? x 10^-7 Wb A^-1 m^-1.

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