In the magnetic circuit shown in Figure P11.2.8 the center leg has the same cross-sectional area as each of the outer legs. The coil has 400 turns. The permeability of iron may be assumed to be infinite. If the air-gap flux density in the left leg is 1.2 T, find:
(a) The flux density in the air gap of the right leg.
(b) The flux density in the center leg.
(c) The current needed in the coil.
