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4.1: The cast iron magnetic core is shown in the figure has a cross-section area of 4 cm, length of 0.438 m and relative permeability

4.1: The cast iron magnetic core is shown in the figure has a cross-section area of 4 cm, length of 0.438 m and relative permeability of 400. The air gap has a length of 2 mm. The attached coil has 1000 turns and flows a current of 1 A. Determine the mmf, reluctance of the core and air gap and the magnetic flux in the core material.

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