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Question: c a toroidal ring of soft iron has outer radius...

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c) A toroidal ring of soft iron has outer radius 2.2m and inner radius 1.8m. It is overwound with 2000 turns of wire which carries a current of 10 A. What is the azimuthal magnetic intensity at a radius of = 2m? The ring has a permanent magnetization of Me = 3000 Am-1 in the azimuthal direction. Compute the az- imuthal magnetic flux density at r 2m. 5 marks PanSwev d) The ring in (c) has a gap cut in its circumference which is d 5cm wide such thaft the ends of the ring are parallel to each other. There is now no current flowing in the wire. Show that the magnetic intensity in the ring, Hring, is Hring 2TT and compute the numerical values for Hring, Bring, Heap and Bgap where B dénotes the magnetic flux density and the suffix gap refers to quantities defined in the gap. [10 marks] wes Bop

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