Strong Ndfeb Magnet manufacturer introduced that magnets can hold the iron, nickel, cobalt, and other metals, commonly known as iron magnets. It can be divided into common permanent magnets and electromagnets that only have magnetism when energized. If the magnet is made into a rod or needle shape and suspended, it will naturally point to the south and north poles of the earth. Magnets are divided into large magnets and small magnets.
Large magnets Magnets have a wide range of uses. Electromagnets are used to make cranes for transporting the steel. It becomes a magnet with strong magnetism after power on, so it can attract heavy steel. Just cut off the power when putting down the steel.
Small magnets Compared with large magnets, compasses are small and light, and their magnetism is much weaker. The function of the compass is not to attract iron, but to reflect the magnetic force of the earth.
The property of magnets to attract iron, cobalt, nickel, and other substances is called magnetism. The areas with strong magnetism at both ends of the magnet are called magnetic poles, one end is the north pole (N pole) and the other end is the south pole (S pole). Experiments show that magnetic poles of the same sex repel each other, and magnetic poles of the opposite sex attract each other.
There are many primary magnets in iron with two opposite magnetic poles. When there is no external magnetic field, these primary magnets are arranged in disorder, their magnetism cancels each other out, and they do not show magnetism to the outside. When the iron is close to the magnet, the original magnets are arranged neatly under the action of the magnet, so that the end close to the magnet has a polarity opposite to that of the magnet and attracts each other. This shows that the iron can be magnetized by the magnet due to the existence of the original magnet. Metals such as copper and aluminum have no original magnet structure, so they cannot be attracted by magnets.