Question

3-28. A very long, nonmagnetic conductor (,-) of radius a carries the static current I as shown. The conductor is surrounded by a cylindrical sleeve of nonconducting magnetic material with a thickness extending from ρ-; a top-b and the permeability μ. The surrounding region is air. (a) Make use of symmetry and Ampère's law (3-66) to find H and B in the three regions (Label the closed lines employed in the proof, depicting H in the proper sense on each line.) (b) Find the M field in the magnetic region. If I 628 A, a-1 cm, b-1.5 cm, μ,-: 6 for the magnetic sleeve, sketch H. Вф, and Мф versus for this system. Comment on the continuity (or otherwise) of these tangential fields at the interfaces. (c) By use of (3-56) and (3-73b), find the volume magnetization current density Jm and the bound surface current densities Jsm within and on the magnetic sleeve. D ds A (3-66) (3-73b) [3-56] Tt M, M, M,

Answer 1

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