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if x stands for the magnetic susceptibility of a given material identify the class of materials for which (i) -1<x<0 (ii) 0<x<n(n stands for small positive number)

a) write the relative magnetic permeability of these materials.

ii) 0<x<n here, the magnetic susceptibility x is positive but is small, so the substance is paramagnetic.

a) Relative magnetic permeability µ

_{r}= 1 + x

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