Do you have to pull the chain behind the tanker to prevent static electricity?
The reason is that the earth causes the electrified body and the earth to be at the same potential. Because the electricity is very small, the earth will not react basically, so it becomes a zero potential
The chain will rub against the ground and produce static electricity that will be introduced into the ground when it comes into contact with the ground
Behind the tanker, a chain of iron is pulled to prevent the oil from rubbing against the tank, causing static electricity to ignite the oil, and some are replaced by a rubber band, all of the same!
Therefore, the static electricity produced by the friction will go down to the lower electric potential, and the static electricity of the oil tank will be introduced into the earth
