Static electricity on people is mainly caused by clothes or the friction between clothes and the body. Touch the wall because it can conduct static electricity to the wall (mainly because the wall is not an insulator). However, many walls are not very effective when tiled and painted. The best way is to touch the water pipe.
Static electricity is generated because the nucleus is not attractive enough to the outer electrons and loses electrons under the action of friction or other factors, thus making the friction object negatively charged (that is, gaining negatively charged electrons and losing positively charged electrons).
When the friction material has good insulation performance, these charges cannot be lost and will gather. Moreover, due to the poor capacitance of the insulator, although the amount of charge is not large, the voltage is very high.
Extended data:
Under different humidity conditions, the electrostatic potential produced by human activities is different. In the dry season, human static electricity can reach several thousand volts or even tens of thousands of volts. When the electrostatic voltage is 50,000 volts, people will not feel uncomfortable, and carrying120,000 volts of high-voltage static electricity will not be life-threatening.
However, electrostatic discharge will also produce electromagnetic fields around it. Although the duration is short, the intensity is great. Researchers are studying the influence of electrostatic electromagnetic field on human body.
The simplest way to eliminate the harm of static electricity is to introduce static electricity into the ground, such as grounding the equipment with wires; Install discharge brushes at the wing tip and tail of the aircraft, and use grounding tires and grounding wires on the landing gear of the aircraft; The tail of the tanker is tied with a grounding chain; In the chemical production, storage and transportation departments, it is forbidden to use chemical fiber fabrics, and it is forbidden for workers to wear chemical fiber work clothes.
Baidu encyclopedia-human static electricity