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magnetic field at a distance * from the ...

magnetic field at a distance * from the axis where (a) * . Assume that the current density is uniform in the inner wire and also uniform in the outer shell. 0.9- A long cylindrical conductor of radius R carries a current i as shown in figure. The current density j is a function of radus according to, j = br, where b is a constant. Find an expression ior the magnetic field B (a) at a distance r, R, measured from the axis.

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