Electromagnet, is able to generate magnetism after electricity, like a magnet can absorb iron objects.

Electromagnets can be used in a variety of fields, such as large amusement equipment, automobiles, aerospace, industry, and other undertakings.

Common electromagnet applications such as: punch clock at work, cash register in supermarkets, automatic doors into some units. These electromagnets are converted into magnetic fields by electrical energy, and then the magnetic force generated by the magnetic field acts on the iron core at the center of the electromagnet to make the iron core move. The main application of electromagnets is the force generated by the movement of iron cores. This force can do at least a few grams of dozens of grams, in theory can do infinite, basically can do hundreds of kilograms is almost.

The magnetic effect of the current is proof of the existence of a magnetic field around the current. When the electromagnet is energized, there is a current through the coil to produce a magnetic field, so that the magnetic field acts on the iron core and produces action.