Question: A steady current I flows down a long cylindhcal wire of radius a (Fig. 5.40). Find the magnetic field, both inside and outside the wire,

A steady current I flows down a long cylindhcal wire of radius a (Fig. 5.40). Find the magnetic field, both inside and outside the wire, if

(a) The current is uniformly distributed over the outside surface of the wire.

(b) The current is distributed in such a way that J is proportional to s, the distance from the axis.

A steady current I flows down a long cylindhcal wire of radius

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