Magnet magnetic field on the human body there is no harm, depending on the magnitude of the intensity of the magnet magnetic field, in general, 3000 gauss (magnetic field unit) below the magnet, no harm to the human body, more than 3000 above the strength of the magnetic field of the magnet, the human body is harmful. Magnets, although harmful to the human body, but negligible, some people are afraid of magnetic fields affect the body, but according to the test, the magnetic field is only one-fifth of the impact of the TV on the human.?
Magnets on the human body's direct harm: Although the magnetic field of the magnet is not harmful to the human body, but direct contact with the magnet itself may be directly to the following injuries:
1, the magnet's direct suction may be caused by the folder injury, which is particularly strong neodymium-iron-boron magnets and large magnets to the human body of the folder injury injury injury is more damage.
2, magnets from the mouth into the body of the more serious injuries, may be life-threatening, because the magnet itself with magnetic, in the body of the mutual attraction will cause the body of the intestinal perforation, caused by hemorrhage, the situation will be life-threatening, please be careful with magnets directly to the children to play.
Extended information:
1, 1822, the French physicists Arago and Lussac found that when the electric current passes through which there is a piece of iron in the wire winding, it can make the iron in the winding magnetized.
2, 1829, the American electrologist Henry on the Sturgeon electromagnet device made some innovations, insulated wire instead of bare copper wire, so do not have to worry about being too close to the copper wire and short circuit. As the wires are insulated, they can be tightly wound together in a circle, because the denser the coil, the stronger the magnetic field generated, which greatly improves the ability to convert electrical energy into magnetic energy.
3. In 1831, Henry tried out a newer electromagnet, which, though not very large, could suck up a 1-ton block of iron. The invention of the electromagnet also led to a great increase in the power of the dynamo.
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