(01 mark) (a) Magnetic saturation occurs when all the dipoles in the different domains have been made to face in the same direction and the material has achieved its maximum magnetic strength. (03 marks) (b) Magnetic shielding is when magnetic field lines are prevented from reaching a certain region. Magnetic shielding is achieved by placing a soft iron ring in the path of a magnetic field such that the field lines are concentrated to pass through the ring, preventing them to reach region X found inside the ring. (c) magnetic field patterns resulting from two straight (01mark) conductors placed vertically near each other carrying a current in: (i) the same direction. (ii) (ii) opposite directions. (01 mark) (05 marks) (d)(i)
(a) Magnetic saturation occurs when all the dipoles in the different domains have been made to face in the same direction and the material has achieved its maximum magnetic strength. (01 mark) (b) Magnetic shielding is when magnetic field lines are prevented from reaching a certain region. Magnetic shielding is achieved by placing a soft iron ring in the path of a magnetic field such that the field lines are concentrated to pass through the ring, preventing them to reach region X found inside the ring. (03 marks) (c) magnetic field patterns resulting from two straight conductors placed vertically near each other carrying a current in: (i) the same direction. (01mark) (ii) (ii) opposite directions. (01 mark) (d)(i) (05 marks)