the magnetic circuit shown below, has following dimensions: l1 = 10cm. l2 = l3=18cm, cross sectional area of l1 path = 6.25cm2 , cross-sectional area of l2 and l3 paths = 3 cm2 , length of air gap =2mm. taking the relative permeability of the core material as 800, find the required current in the 600 turn exciting coil so as to establish a flux of 100μwb in the air gap. neglect leakage and fringing.
