Question

Relative permitivity and permability of a material ${\epsilon }_r$ and ${\mu }_r$ respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

• 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

Answer: (B)

${\epsilon }_r=1.5,{\mu }_r=0.5$

For a diamagnetic material, the value of ${\mu }_r$ is less than one.

For any material, the value of ${\epsilon }_r$ is always greater than $1$