5.6 A cylindrical conductor of radius a has a hole of radius b bored parallel to, and
亗 centered a distance d from, the cylinder axis (d + b < a). The current density is
uniform throughout the remaining metal of the cylinder and is parallel to the axis.
Use Ampere’s law and principle of linear superposition to find the magnitude and the
direction of the magnetic-flux density in the hole.
Ampere’s law in integral form states
I
~ ...


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