Magnetic Force on a Permeable Wire

  title={Magnetic Force on a Permeable Wire},
  author={Kirk T Mcdonald},
1 Problem What is the force per unit length on a wire of radius a and (relative) permeability μ′ when it carries uniform current density J = I ẑ/πa and is placed along the z axis in a magnetic field whose form is Bi = B0 x̂+B1[(x/a) x̂− (y/a) ŷ] before the wire is placed in that field? The medium surrounding the wire is a nonconducting liquid with relative permeability μ = 1, and the wire is held at rest by “mechanical” forces. The form of the initial magnetic field has been chosen so that… CONTINUE READING

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