Ferromagnetism — Prelims Questions

Which of the following statements is INCORRECT regarding ferromagnetic materials?

A ferromagnetic material is heated above its Curie temperature. What will be its magnetic behavior?

Which of the following materials is NOT an example of a ferromagnetic substance?

A material exhibits a broad hysteresis loop. This material is most likely suitable for:

The area enclosed by a hysteresis loop represents:

The magnetic susceptibility of a paramagnetic material above its Curie temperature ($T_C$) is given by the Curie-Weiss law. If a ferromagnetic material has a Curie temperature of $300,\text{K}$ and a Curie constant of $0.5,\text{K}$, what is its magnetic susceptibility at $350,\text{K}$?