Question

If the relative permittivity and permeability of a given material are ${ϵ}_{\text{r}}$ and ${\mu }_{\text{r}}$ , respectively then, which among the following is correct for a diamagnetic material?

• A. ${ϵ}_{\text{r}}=\text{1.5}\text{,}{\mu }_{\text{r}}=\text{1.5}$
• B. ${ϵ}_{\text{r}}=\text{0.5}\text{,}{\mu }_{\text{r}}=\text{1.5}$
• C. ${ϵ}_{\text{r}}=\text{1.5}\text{,}{\mu }_{\text{r}}=\text{0.5}$
• D. ${ϵ}_{\text{r}}=\text{0.5}\text{,}{\mu }_{\text{r}}=\text{0.5}$

Answer 1

Answer: (C)

The values of relative permeability of diamagnetic materials are slightly less than 1 and ${ϵ}_{\text{r}}$ is quite high. According to the table given, one takes ${ϵ}_{\text{r}}=\text{1.5}\text{ and }{\mu }_{\text{r}}=\text{0.5}$ . The choice ( ${ϵ}_{\text{r}}=\text{1.5}\text{,}{\mu }_{\text{r}}=\text{0.5}$ ) is correct.