Electrical and magnetic properties
The magnetic moment of a system measures the strength and the direction of its magnetism. The term itself usually refers to the magnetic dipole moment. Anything that is magnetic, like a bar magnet or a loop of electric current, has a magnetic moment. A magnetic moment is a vector quantity, with a magnitude and a direction.
An electron has an electron magnetic dipole moment, generated by the electron's intrinsic spin property, making it an electric charge in motion. Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Every material is influenced to some extent by a magnetic field.
Magnetism. Only a variety of one mineral acts as a magnet, generating magnetic fields on its own. This mineral is Lodestone, the magnetic variety of Magnetite, which found in only a few deposits throughout the world. Although it is only weakly magnetic, its magnetism is definitely discernible.
Permeability
It is the property of magnetic material which indicates that how easily the magnetic flux is build up in material. Some time is also called as the magnetic susceptibility of material. It is determined by the ratio of magnetic flux density to magnetizing force producing this magnetic flux density.
Properties of magnets
Attractive Property
Magnet attracts ferromagnetic materials like iron, cobalt and nickel.
Repulsive Properties
Unlike magnetic poles attract each other(N and S). Like magnetic poles repel each other (N and N) or (S and S).
Directive Property
A freely suspended magnet always points in a north-south direction.
Similarities between electricity and magnetism
The electricity and magnetism are closely related. The flow of electrons produce a magnetic field and spinning magnets cause an electric current to flow. The electromagnetism is the interaction of these two important forces.