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# Relative permittivity and permeability of a material are $\in_r$ and $\mu_r$ , respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

$\begin {array} {1 1} (a)\;\in_r=0.5, \mu_r = 1.5 & \quad (b)\;\in_r=1.5, \mu_r = 0.5 \\ (c)\;\in_r=0.5, \mu_r = 0.5 & \quad (d)\;\in_r=1.5, \mu_r = 1.5 \end {array}$

For diamagnetic material, $0< \mu_r<1$ and for any material $\in_r >1$
Ans : (b)