Electromagne The Fig. P4.1 shows a cylindrical electromagnet in close contact with a 2-cm thick iron disc. The dimensions given are in centimeters. The density of the iron is 7.85 g/cm³ and the relative permeability is μ = 500. The relative permeability of the electromagnet is mr = 2000. The number of turns on the coil N=500. [=4xx 107]; [g= 9.81 m/s²] (a) Determine the mean lengths I, I, I, and l;. (b) Determine the cross-sectional areas A, and A2. (c) Determine the reluctances R, R, R., and R. (d) Determine the volumes center cylinder V, outer cylinder Vo, and iron Vi,. (e) Determine the mass of the iron. (f) Determine the force of the iron. (g) Determine flux density in the iron Bj. (h) Determine flux in the iron D. (i) Determine the current required in the coil. 2 cm T 5 cm dia Ac 13 cm dia -4 11 cm dia 15 cm dia Fig. P4.1 +