Question: A potential difference V drives a steady current I through an ohmic wire with conductivity and a constant circular cross section. One portion of

A potential difference V drives a steady current I through an ohmic wire with conductivity σ and a constant circular cross section. One portion of the wire has the shape of a circular arc with inner radius of curvature R₁ and outer radius of curvature R₂. Find the dependence of the current density j on the local radius of curvature r defined in the diagram.

R R I

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