Why is it easy to get static electricity when the climate is dry?

Static electricity is produced by the transfer of electrons in the outer layer of atoms by various external forces to form positive ions and negative ions respectively. Any two objects with different materials will transfer and accumulate charges after contact, forming static electricity. The static electricity on the human body is mainly caused by the friction between clothes or between clothes and the body, so the "electrification" is different when wearing clothes of different materials. For example, clothes made of chemical fiber are more likely to generate static electricity, while clothes made of cotton generate less static electricity. And because the dry environment is more conducive to the transfer and accumulation of charges, 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, human static electricity can reach several thousand volts or even tens of thousands of volts. Experiments show that when the electrostatic voltage is 50,000 volts, the human body has no uncomfortable feeling, and carrying 1.2 million volts of high-voltage static electricity is not 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.