Why do you get an electric shock when you touch metal in winter?

Why do you often get an electric shock when touching a metal door handle in winter?

When it is dry in winter, the friction between human body and clothes produces electric charge, which accumulates more. When touching the door handle and shaking hands with people, there will be a discharge (current flows through the human body), so you often get an electric shock. This kind of electricity is generally called "static electricity", which is explained below. Introduction: Static electricity is a kind of electrostatic charge. In the dry and windy autumn, people often encounter this phenomenon in their daily lives: when they take off their clothes and sleep at night, they often hear a crackling sound in the dark, accompanied by blue light. When we meet and shake hands, our fingers just touch each other and suddenly sting like fingertips. When I get up in the morning to comb my hair, my hair often "floats". The more rational, the more chaotic. When you pull the door handle or turn on the tap, you will get an electric shock and often make a "bang, bang" sound. This is static electricity generated by human body.

The static electricity generated by human body through the friction of clothes accumulates a lot. When the hand touches the metal handle, static electricity is released through the handle, thus generating current. This situation is related to the material of clothes and doors, so if you want to avoid this phenomenon, please don't wear cotton clothes or chemical fiber clothes. The reason is the static electricity generated by human body, and the reason why touching metal objects in winter will get an electric shock is the result of static electricity "discharging" outward in the body. Electric shock is caused by current, but the current discharges to other wires or the earth through the contacted objects (such as wires), and the current flows to the body and dies when it reaches a certain current. Current flows because there is a voltage difference between a conductor and the ground or another conductor. If there is no voltage difference, there is no voltage, and of course there is no current.

People with dry weather and dry skin are particularly prone to static electricity. Because the dry environment is easy to accumulate charges. In fact, anyone may be "touched" by static electricity, but some people have high water content in their skin, and electrostatic charges are introduced into the ground, which has little effect on their bodies. On the other hand, people with dry skin have good insulation, so it is difficult to introduce charges into the ground, and their bodies are in an insulated state. Static electricity is easy to accumulate without divergence, and when it reaches a strong electrostatic pressure, people will be charged. People who lack oxygen in the body are prone to static electricity if they lack oxygen in the body. If we are too tired, our bodies will lack oxygen and produce a lot of positive charges. In winter, the accumulated charge becomes difficult to disperse and gradually forms voltage. Harm of static electricity: Excessive accumulation of static electricity in the body will cause abnormal current transmission in the cell membrane of brain nerve and affect the central nervous system.