Why can magnets absorb iron? Where does its energy come from?

There is a magnetic field around the magnet. The magnetic field is a special kind of material. He stores the magnetic energy in the magnetic field. The magnet attracts iron because the iron also has small magnetic domains, which can be easily attracted by the magnetic field magnetization. The attraction of magnets to iron, the source of energy is the magnetic field.

Under normal circumstances, there are countless magnetic moments inside the magnetic substance, and these magnetic directions are disordered and cancel each other, so that the substance does not show magnetism. When an external magnetic field acts on the magnetic substance, the external magnetic field can work to magnetize the magnetic magnetic material inside the magnetic material to be uniform, so that the magnetic field superimposed and strengthen each other, and finally the magnetic field is externally released. This is the birth process of the magnet. The magnetic field of the magnet stores magnetic energy, which can be done by magnetic force, which is somewhat similar to an electric field.

Magnets Absorb Iron

Magnets Absorb Iron

The electromagnetic field exists around the magnet or charge and interacts with the substance. The energy of the magnet is transmitted in this way; the source of energy is given by the magnet itself.

The reason why the magnet can attract the iron block is because the electromagnetic field excited by the magnet is coupled with the microscopic magnetic effect formed by the internal electron movement of the iron, which causes the iron block to be attracted by the magnet.

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