1, physical action
1), which means north and south.
2) Attracting light and small objects
3) Electromagnets can be used as electromagnetic relays.
4), motor
5), generator
6)、
electroacoustic
7), magnetic therapy
8), magnetic levitation
9), nuclear magnetic resonance * * *
2, dietotherapy effect
1), the magnet is salty and flat; Liver and kidney meridian; The quality of the town has declined;
2) It has the effects of calming the liver and suppressing yang, improving hearing and eyesight, calming the nerves and relieving asthma;
Indications: dizziness due to liver yang, palpitation and insomnia, blurred vision, tinnitus and deafness, and asthma due to kidney deficiency.
Magnets will not have adverse effects on the body, so you can use magnetic materials with confidence. The earth itself has a strong magnetic field, so people themselves have an adaptation or even dependence on magnetism. A weak and stable magnetic field is good for the body, and magnetic therapy is often used in medical treatment. Electromagnetic wave is different. It is a kind of high-energy wave, and its frequency will have a bad influence on the body. So magnets are harmless to the human body.
Magnets are made up of atoms such as iron, cobalt and nickel. Their atoms have special internal structures and have their own magnetic moments. Magnets can generate magnetic fields and attract ferromagnetic substances, such as iron, nickel, cobalt and other metals.
Types of magnets: shape magnets: square magnets, ceramic tile magnets, irregular magnets, cylindrical magnets, circular magnets, disk magnets, bar magnets, magnetic frame magnets, nature magnets: samarium cobalt magnets, neodymium magnets (strong magnets), ferrite magnets, Al-Ni-Co magnets, Fe-Cr-Co magnets, industrial magnets: magnetic elements, motor magnets, rubber magnets, plastic magnets. Magnets are divided into permanent magnets and soft magnets. Permanent magnets strengthen magnetism, so that the spin of magnetic substances and the angular momentum of electrons are arranged in a fixed direction, while soft magnets are electrified. (It is also a method of adding magnetic force)
When the soft iron is removed by equal current, it will gradually lose its magnetism.
Hang the midpoint of the bar magnet with a thin wire. When it is at rest, its two ends will point to the south and north of the earth respectively. One end pointing to the north is called North Pole or N Pole, and the other end pointing to the south is called Guiding Pole or S Pole.
If you think of the earth as a big magnet, the geomagnetic north pole of the earth is the guiding pole, and the geomagnetic south pole refers to the north pole. Between magnets, magnetic poles with the same name repel each other and magnetic poles with different names attract each other. So the compass repels the south pole, the north arrow repels the north pole, and the compass attracts the north arrow.
Classification: Magnets can be divided into "permanent magnets" and "non-permanent magnets". Permanent magnets can be natural products, also known as natural magnets, or artificial. Non-permanent magnets, such as electromagnets, are magnetic only under certain conditions.