A long straight conducting rod carries a current I with a non-uniform current density J = ar2, and has a radius R. The value of the constant is 28.5 A/mm4 and the radius of the rod is 5.20 mm. Determine the magnitude of the magnetic field at the following points.

(a) r ₁ = R /2

(b) r ₂ = 2 R

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Given data Current density J ar 2 Value of constant a 285 Am... View the full answer