When we take off our clothes, there is always a crackling sound. If we can see a slight light in the dark, it is like electricity. It is very magical. I sorted out why people have static electricity? Who is prone to static electricity? Welcome to learn from.
Why do people have static electricity?
Human body static electricity is the static electricity attached to the human body caused by the mutual friction of clothes on the human body. The generation of static electricity is due to the insufficient attraction of the electrons in the outer layer of the atomic nucleus, resulting in the loss of electrons under the action of friction or other factors, resulting in the negative charge of the friction material (that is, the negative charge of the obtained electrons and the positive charge of the lost electrons). When the insulation performance of friction materials is relatively good, these charges cannot be lost and will accumulate. Moreover, due to the poor capacitance of the insulator, the voltage is very high although the amount of charge is small.
Clothes made of chemical fibers are more likely to produce static electricity, while cotton clothes produce less static electricity. And because the dry environment is more conducive to charge transfer and accumulation, people will feel more static electricity in winter.
Under different humidity conditions, the electrostatic potential produced by human activities is different. In the dry season, the static electricity of human body can reach thousands of volts or even tens of thousands of volts. Experiments have proved that the human body does not feel uncomfortable when the electrostatic voltage is 50000 volts, and there is no life danger when carrying 120000 volts of high-voltage static electricity. However, electrostatic discharge will also generate electromagnetic fields around it. Although the duration is short, the intensity is very high. Researchers are studying the effect of Electrostatic Electromagnetic Field on human body.
Who is prone to static electricity?
People with dry skin
If a person's skin is dry and the air is dry, there is no way to discharge the static electricity from his body, which will easily lead to the accumulation of static electricity. When we come into contact with other people, if other people's skin is relatively dry, the static electricity from his body will be introduced to you. At this time, there will be a feeling that he seems to be hit by electricity, In fact, each of us may have the possibility of being electrified, but if the skin is more tender, the more water it contains, the static electricity will be easier to be introduced through the body, which is not easy to have static electricity. If the skin is dry and the body has less water, the static electricity will be more difficult to discharge from the body, resulting in accumulation and discharge.
People who lack oxygen
When our body is lack of oxygen, there will be static electricity. For example, when we feel tired during exercise or work, there will be symptoms of hypoxia, such as breathing in a big mouth. When the body is lack of oxygen, some positive charges will be generated. If there is frequent hypoxia, there are too many charges, coupled with the dry climate, the conductivity of the air is very poor, and the charge cannot flow out, it will slowly become voltage in the body, This causes static electricity.