Why should a lightning rod be placed on the top of a tall building?
The main role is to prevent the lightning arrester spark occurs, the lower thundercloud is usually negatively charged, the electronic lightning rod on rejection and underground, tip will carry a large number of positive charges, the positive charge by the lightning rod tip into the space, and can produce slow, avoid spark discharge the occurrence of severe, to protect the safety of the building. If the building receives an electric shock, the charge will be safely brought down to the ground along the copper wire.
The lightning rod is the point conductor at the highest point of the building, the large metal needle we see, which is passed through a thick copper wire. One end of the earth is buried in a wet soil of a certain depth or is attached to a metal plate buried in the ground to keep it in good electrical contact with the earth.
There are lightning rods at the top of modern high-rise buildings. The lightning rod is designed according to the principle of the discharge at the tip. The lightning rod is American scientist Franklin after the famous kite experiment, invented the lightning rod. The tip discharge refers to the charge accumulation in a tip, to a certain extent, can make the surrounding air ionization caused by discharge phenomenon.
