The relative permeability $(μ_{r})$ of a ferromagnetic substance varies with temperature (T) according to the curve :

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Solution

The correct option is C C
We know that magnetic susceptibility $(X) = (μ_{r} - 1)$ where $μ_{r} = r e l a t i v e p e r m e a b i l i t y$

$\Rightarrow$ $X \propto μ_{r}$
From the above graph option $C$ is correct.

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