Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively

A) small, positive and small, positive

B) large, positive and small, negative

C) small, positive and small, negative

D) large, negative and large, positive


Option C


 The magnetic susceptibility  of a magnetic  substance is defined as the ratio of intensity of magnetisation (l) to magnetic intensity (H)  , i.e,

  x= $\frac{l}{H}$

 For paramagnetic material, x is positive  and small (0  < x < ε ), where ε   is small positive number

 For diamagnetic meterial , x is negative and small  $(-1 \leq x \leq0)$