If a piece of metal is thought to be a magnet,which one of the following observations would offer conclusive evidence?

Out of the following units,the $WRONG$ unit of magnetic dipole moment is

$A$ sample of a ferromagnetic iron in the shape of a cube of side $1.0 \mu m$ contains $8.7 \times 10^{28}$ atoms per cubic metre and the magnetic dipole moment of each iron atom is $9.3 \times 10^{-24} A m^2$. Then the maximum possible magnetic dipole moment (in $A m^2$) of the sample is nearly

Give some of the commonly known ideas regarding magnetism.

If a bar magnet of pole strength $m$ and magnetic moment $M$ is cut equally $5$ times parallel to its axis and again $3$ times perpendicular to its axis, then the pole strength and magnetic moment of each piece are respectively

Write the analogy between electrostatics and magnetism.