A infinite cylinder of radius a carries a magnetisation vector  M = M0ρaz . Find magnetic field inside and outside cylinder

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= The rectangular coil shown in the figure below is in a magnetic field with = 0.05(x + y) T. Find the torque about the z axis when the coil is in the position shown and carries a current of 5A. - 0.04 m X Z -0.08 m 1 →y

10 Given a common magnetic core whose length is 100 cm, its cross-sectional area is 25 cm square. The relative permeability of the core material is 5000. Two coils are tightly wound on the core. N1 =1000 turns and N2 = 500 turns. The self-inductance of coil N1 will be: [ 7.85 m H 15.7 m H 3.927 m H 5.17 mH