The B-H magnetization curve of isotropic silicon electric steel Armco-DI-Max M19, is shown in FIGQ4.a In your own words briefly explain the characteristics of this material, mention what type of

magnetic materials soft or hard. Outline the reason for the nonlinearity of the curve,also mention the rational of adding silicon to the electric(i)steel. (ii) Find the relative permeability of the steel at H=700 A/m, (iii) A ring of silicon steel has a mean diameter of 80 mm, and there is a coil of 1200 turns wound on the ring. Determine the current in the coil that will give a flux density of 1.1 T in the ring. State Ampere's circuital law. A thin conductor of infinite length is carrying a current of2A. Determine the field intensity H(A/m) 10 mm away from the conductor \mathrm{R}_{0}=4 \text { ig } 10^{-7} \mathrm{H} / \mathrm{m} .