Q. Relative permittivity and permeability of a material are $\varepsilon_{r}$ 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) $\varepsilon_{r} = 1.5,\mu_{r} = 1.5$
Explanation
(b) For diamagnetic material, $0 < \mu_{r} < 1$ and for any material $\varepsilon_{r} > 1.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.