Name the suitable material for an electromagnet.

The most exotic diamagnetic materials are

Which of the following statements is true in respect of diamagnetic substances?

Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature,then it will show

Curie temperature is the temperature above which

Three identical bars $A, B$ and $C$ are made of different magnetic materials. When kept in a uniform magnetic field,the field lines around them look as follows: Make the correspondence of these bars with their material being diamagnetic $(D)$,ferromagnetic $(F)$ and paramagnetic $(P)$.