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Three identical specimens of magnetic maerials , uniform magnetic field. Draw the modification in the field lines in each case. Justify your answer. |
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Answer» Solution :We know that nickel is ferromagnetic , ANTIMONY is diamagnetic and aluminium is paramagnetic in nature. Modified field lines in specimens of these materials have been shown in ADJOINING fig. Since RELATIVE permeability of a ferromagnetic material is very high `(mu_r gt gt 1)` , hence all the field lines bend and pass through the ferromagnetic material. As relative permeability of a paramagnetic material is SLIGHTLY more than `1 (mu_r gt 1)` , magnetic field lines slightly bends towards the paramagnetic materials. As relative permeability of a diamagnetic material is slightly less than `1(mu_r lt1)` , magnetic field lines bend away from the diamagnetic material. 
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