Physics, 20.12.2019 03:31 salejandro68
Awire of circular cross-section carries current density that is not uniform but varies with distance from the center as j(r) = a r / r, for radius r in the range 0 < r < r. here, a is a constant with units amperes per square meter, and the radius of the wire is r = 8.1 mm. find an expression for the magnetic field outside of the wire, for r > r.
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