The magnetic susceptibility of ferromagnetic materials is

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

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 $(P)$.

Alnico is an alloy of . . . . . . .

$A$ paramagnetic sample shows a net magnetisation of $8 \text{ Am}^{-1}$ when placed in an external magnetic field of $0.6 \text{ T}$ at a temperature of $4 \text{ K}$. When the same sample is placed in an external magnetic field of $0.2 \text{ T}$ at a temperature of $16 \text{ K}$,the magnetisation will be

If a magnetic substance is kept in a magnetic field,then which of the following is thrown out?