Embibe Experts Solutions for Chapter: Matter and Magnetism, Exercise 3: Exercise - 3

Needles $N_1, N_2$ and $N_3$ are made of a ferromagnetic, a paramagnetic and a diamagnetic substance, respectively. A magnet when brought close to them will

Relative permittivity and permeability of a material are ${\epsilon }_{\text{r}}$ and ${\mu }_{\text{r}}$, respectively. Which of the following values of these quantities are allowed for a diamagnetic material?