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Unformatted text preview: 2 An in±nitely long hollow iron cylinder of permeability μ , and cross section de±ned by concentric circles of radii a , b ( a < b ) is placed in a uniform magnetic ±eld directed perpendicular to the axis of the cylinder. Show that the ²ux of magnetic induction B through the cylinder is changed by inserting the cylinder in the ±eld, by the ratio b 2 ( μ + 1) 2-a 2 ( μ-1) 2 2 μ ( b 2 ( μ + 1)-a 2 ( μ-1)) a b H μ 1 3. Jackson problem 5.3. 4. Jackson problem 5.7. 2...
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