Who invented the lightning rod? What is it?
The lightning rod also forms a capacitor with these charged clouds. Because of its sharp tip, the two plate of the capacitor is facing a small area, and the capacitance is very small, that is to say, it can hold very little charge. And it brings together most of the charge, so when there is more charge on the clouds, the air between the lightning rod and the cloud is easily broken down and become a conductor. Thus, the electrified cloud layer forms a passage with the lightning rod, and the lightning rod is grounded, and the lightning rod can lead the charge on the cloud to the ground, so that it does not pose a danger to the high-rise building and ensures its safety.
In a thunderstorm, building over charged clouds, lightning and are at the top of the tall building on a large number of induction charge, due to lightning needle is pointed, so the electrostatic induction, the tip conductor always gathered the most charge. In this way, the lightning rod gathers most of the charge
The modern lightning rod was invented by American scientist Franklin. Franklin thinks lightning is a discharge phenomenon. To prove this, he braved the risk of lightning during a thunderstorm in July 1752, flying a kite with a long metal wire into a thunderstorm and tying a string of silver keys at the end of the wire. When the lightning struck, Franklin approached the key, and a spark of electric sparks appeared on the key. There's numbness in your hands. Fortunately, the lightning passed down this time was weak, and Franklin was unhurt.
