The variation of intensity of magnetisation ( | vedclass

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(D) The intensity of magnetisation $(I)$ is related to the magnetic field intensity $(H)$ by the relation $I = \chi H$,where $\chi$ is the magnetic su

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diamagnetic,ferromagnetic,paramagnetic

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(D) The intensity of magnetisation $(I)$ is related to the magnetic field intensity $(H)$ by the relation $I = \chi H$,where $\chi$ is the magnetic susceptibility.For diamagnetic materials,$\chi$ is small and negative,so $I$ is negative for positive $H$. This corresponds to line $OX$.For paramagnetic materials,$\chi$ is small and positive,so $I$ is positive and small for a given $H$. This corresponds to line $OZ$.For ferromagnetic materials,$\chi$ is large and positive,so $I$ is positive and large for a given $H$. This corresponds to line $OY$.Therefore,$X$ is diamagnetic,$Y$ is ferromagnetic,and $Z$ is paramagnetic.

The variation of intensity of magnetisation $(I)$ and the applied magnetic field intensity $(H)$ for three magnetic materials $X$,$Y$ and $Z$ are shown in the graph as $OX$,$OY$ and $OZ$ respectively. The materials $X$,$Y$ and $Z$ respectively are:

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