Question

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

• A. $\varepsilon_r = 0.5 , \mu_r = 1.5$
• B. $\varepsilon_r = 1.5 , \mu_r = 0.5$
• C. $\varepsilon_r = 0.5 , \mu_r = 0.5$
• D. $\varepsilon_r = 1.5 , \mu_r = 1.5$

Answer 1

Answer: (B)

$\varepsilon_r = 1.5 , \mu_r = 0.5$

Answer 2

For a diamagnetic material, the value of $\mu_r$ is less than one. For any material, the value of $\in_r$ is always greater than 1.