Q1. The magnetic circuit show below provides flux in the two air gaps. The coils (N1 = 500, N2 = 300) are connected in series and carry a current of

1.5 A. The relative permeability of the iron core is 5000 and the fringing at the air gaps is 15 percent a) the flux and flux density in the air gap le1, b) the flux and flux density in the air gap lg2 , and c) the flux and flux density in the central limb of the core.