A uniform magentic field gets modified as shown in the figure, when two specimens X and Y are placed in it.
(i) Identify the two specimens X and Y.
(ii) State the reason for modification of the field lines in X and Y.
(i) X is diamagnetic and Y is ferromagnetic.
(ii) Diamagnetic materials have permeabilities less than 1 (one) and have negative susceptibility.Their atoms and molecules do not have permanent dipole moment. The field lines get expelled in them.Ferromagnetic materials have permeability more than one and susceptibility positive.Their atoms and molecules have permanent dipole moment. So the field lines get concentrated in them.
