Q1: Heating of ferromagnetic materials to a temperature above Curie temperature makes it

ANS:C - behave like paramagnetic materials.

Paramagnetic materials are those that are weakly attracted to an external magnetic field. Unlike ferromagnetic materials, which are strongly attracted to magnetic fields and can retain their magnetization even after the external field is removed, paramagnetic materials only exhibit a weak magnetic response when placed in a magnetic field. When ferromagnetic materials are heated above their Curie temperature, they lose their ferromagnetic properties and transition into a paramagnetic state. In this state, the material's atomic magnetic moments become randomly oriented, causing it to exhibit only a weak magnetic response when subjected to an external magnetic field. Therefore, when ferromagnetic materials behave like paramagnetic materials, it means that they no longer display strong magnetic properties and instead exhibit only a weak attraction to magnetic fields.