The generation and harm of static electricity
The generation of static electricity
When different objects are in contact, due to
the difference in the concentration and work function of the carriers on the
surface of the object, the carriers migrate from one surface to another. If the
two objects in contact are separated, the charged layer will also be separated.
At this time, the surface of one object is positively charged, and the other
object is negatively charged. Therefore, static electricity is a reaction of
physical and chemical processes when solid, liquid, and gaseous substances are
rubbed, broken, sprayed, and suddenly decomposed.
The harm of static electricity
Although the energy generated by static
electricity is small (generally not more than the millijoule level), it may
generate a higher static voltage, and the sparks during discharge may ignite
flammable and explosive materials and cause accidents. Static electricity can
cause damage to voltage-sensitive semiconductor devices.
