The main function of the magnetic field

The magnetic field is a substance that has a magnetic effect on the magnet placed in it. The basic feature of the magnetic field is that it can exert a force on the moving charges in it, that is, the current-carrying conductor is subjected to the force of the magnetic field in the magnetic field. This is the source of the force or moment that the magnetic field exerts on the current and on the magnet. Modern theory, however, states that magnetism is the relativistic effect of electric field forces, and that regions affected by magnetism show that electrical charges passing through the region, or magnetic poles placed in the region, are subject to mechanical forces. 

When an external magnetic field is applied to a substance, the interior of the magnetic substance will be magnetized, and many tiny magnetic dipoles will appear. Magnetization measures the degree to which a substance is magnetized. Knowing the magnetization of the magnetic material, it is possible to calculate the magnetic field generated by the magnetic material itself. Creating a magnetic field requires an input of energy. When the magnetic field is annihilated, this energy can be recycled and therefore, this energy is considered to be stored in the magnetic field.

There is a magnetic field around the magnet, and the interaction between the magnets is mediated by the magnetic field. A special form of matter that exists in space around an electric current, moving charge, magnet, or changing electric field. Since the magnetism of a magnet is derived from an electric current, which is the movement of electric charges, in general terms, a magnetic field is produced by a moving electric charge or a changing electric field.

Magnetic induction is a physical quantity used to express the strength and direction of the magnetic field, and it is a vector, represented by the symbol B. The unit is T (Tesla), 1T=1N/A m. The substance that has a magnetic effect on the small magnetic needle placed in it is called a magnetic field. Magnetic field is a special substance that is invisible and intangible.