Question

Relative permittivity and permeability of a material are ${\epsilon }_r$ and ${\mu }_r$ respectively. The values of these quantities allowed for a diamagnetic material are

• A. ${\epsilon }_r=0.5,{\mu }_r=1.5$
• B. ${\epsilon }_r=1.5,{\mu }_r=0.5$
• C. ${\epsilon }_r=0.5,{\mu }_r=0.5$
• D. ${\epsilon }_r=1.5,{\mu }_r=1.5$

Answer 1

The correct option is B ${\epsilon }_r=1.5,{\mu }_r=0.5$

For diamagnetic material
$0\le {\mu }_r<1$
And for any material, ${\epsilon }_r>1$

So, option B.