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Electric and Magnetic Fields at Long Distance

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Show that for observations made at very large distance (Br >> 1) the electric and magnetic fields of Example 6-3 reduce to (see attached file for formula).

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This solution provides step by step calculations for a question involving electric and magnetic fields at long distance.

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Finding Electric Field of Two Long Co-Axial Cylindrical Surfaces

Two infinitely long coaxial cylindrical surfaces have the z axis as their common axis. The inner surface of radius a carries a surface current K1 = k1 phi, and the outer surface of radius b carries a surface current K2 = k2 phi. Both k1 and k2 are constant. Find B everywhere.

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