B2. B3. A section through a magnetic circuit of uniform cross-sectional area 2 cm² is shown in Figure B2.1 The cast stee

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B2 B3 A Section Through A Magnetic Circuit Of Uniform Cross Sectional Area 2 Cm Is Shown In Figure B2 1 The Cast Stee 1 (94.96 KiB) Viewed 49 times

B2. B3. A section through a magnetic circuit of uniform cross-sectional area 2 cm² is shown in Figure B2.1 The cast steel core has a mean length of 25 cm. The air gap is 1 mm wide and the coil has 5000 turns. The coil produce a flux density of 0.80T. Air gap (h) 1.8 Determine (a) the magnetic field strength (H) of cast steel from B-H curve shown in (2 marks) Figure B2.2; 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 25 cm Ic Mild steel $5000 turns Figure B2.2 (b) the relative permeability (ur) of cast steel; (c) the reluctance of cast steel; (d) the reluctance of air gap; (e) the total circuit reluctance; (f) the flux (Þ); the mmf (Fm); and the current (I) in the coil. Figure B2.1 Cast-steel L Silicon iron 2 Cast iron 1000 2000 3000 4000 5000 6000 7000 Magnetic field strength, H(Al/m) (2 marks) (2 marks) (3 marks) (2 marks) (3 marks) (3 marks) (3 marks)