In the dry season in northern China, when you take off your coat and touch the metal door handle, you are often electrocuted. Why?

When the weather is dry, take off your coat, and your coat and body will be charged due to friction. When you touch the metal door handle with your hand, your body discharges through the door handle, thus giving you a feeling of electric shock.

Human static electricity is the static electricity attached to the human body, which is produced by the mutual friction of clothes on the human body. Static electricity is produced because the nucleus is not attractive enough to the outer electrons, thus losing electrons under the action of friction or other factors.

In this way, the friction material is negatively charged, and when the insulation performance of the friction material is good, 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.

Matters needing attention in electrostatic elimination

1. Before going out, you can wipe the wall with your hands to remove static electricity.

2. After playing mobile phone, using computer or watching TV for a long time, you should wash your bare skin in time, wash your hands and face frequently, which is very good for eliminating static electricity on your skin.

3. Drink plenty of water and supplement vitamin C and calcium at the same time, which can reduce the influence of static electricity on us to some extent.