QOFigure 5.18Figure 5.198. The ring in Figure 5.19 has two halves. The one half is madefrom cast iron, while the other is made from cast steel. The twohalves are held 1 mm apart with the aid of a paper disc. Thecross-sectional area and mean circumference of the ring is 345mm² and 0,6 m respectively. The relative permeability of castiron is 2400, while that of cast steel is 600. The ring has a coil with200 windings. The current flow through the coil causes a fluxdensity of 0,48 T. Calculate the m.m.f. and the current flow. Ignorethe effects of fringing and leakage. Hint - The paper is part ofthe circumference.(1001,9 A, 5,01 A)

Given, Lr=1mmA=345mm2L=0.6mμi=2400μs=600N=200B=0.48T

O O Figure 5.18 Figure 5.19 8. The ring in Figure 5.19 has two halves. The one half is made from cast iron, while the other is made from cast steel. The two halves are held 1 mm apart with the aid of a paper disc. The cross-sectional area and mean circumference of the ring is 345 mm² and 0,6 m respectively. The relative perimeability of cast iron is 2400, while that of cast steel is 600. The ring has a coil with 200 windings. The current flow through the coil causes a flux density of 0,48 T. Calculate the m.m.f. and the current flow. Ignore the effects of fringing and leakage. Hint - The paper is part of the circumference. (1001,9 A, 5,01 A)

O O Figure 5.18 Figure 5.19 8. The ring in Figure 5.19 has two halves. The one half is made from cast iron, while the other is made from cast steel. The two halves are held 1 mm apart with the aid of a paper disc. The cross-sectional area and mean circumference of the ring is 345 mm² and 0,6 m respectively. The relative perimeability of cast iron is 2400, while that of cast steel is 600. The ring has a coil with 200 windings. The current flow through the coil causes a flux density of 0,48 T. Calculate the m.m.f. and the current flow. Ignore the effects of fringing and leakage. Hint - The paper is part of the circumference. (1001,9 A, 5,01 A)