2. The so-called "discharge" is the process from positive current to negative current. This theory is not completely correct, but it retains the names of positive charge and negative charge. The concept of "electricity" in this period is a material proposition. Franklin did many experiments and put forward the concept of current for the first time.
Franklin made others do many experiments, which further revealed the nature of electricity and put forward the term current. Franklin's other great contribution to electricity was to design the famous kite experiment 1752, which proved that lightning in the sky and electricity on the ground are the same thing.
Scientists put a big kite into the cloud with metal wire. A rope is attached to the lower end of the wire, and a bunch of keys are hung on the wire. At that time, Franklin held the rope in one hand and gently touched the key in the other. So the scientist immediately felt a violent electric shock and saw a small spark between his finger and the key. Moreover, the scientist's hand was bounced off. This experiment shows that the kite wire soaked by rain becomes a conductor, which leads to the lightning charge in the air between the finger and the key. This was a sensational event at that time. A year later, Franklin summed up and made the world's first lightning rod.
Extended data:
1, the electrical effect in matter is the link between electricity and other physical disciplines (even non-physical disciplines). There are many kinds of electrical effects in matter, many of which have become or are gradually developing into specialized research fields.
2. The battery we use is based on the same principle as the battery produced by Volt. The shell of the battery is made of zinc; Zinc will be covered with a layer of plastic or tin to prevent the battery from leaking. There is no silver or copper in the battery, but there is a carbon rod in the middle.
3. The discovery and application of electricity has greatly saved human physical and mental work, made human strength grow wings and extended human information tentacles. The influence of electricity on human life has two aspects: the acquisition, conversion and transmission of energy and the basis of electronic information technology. The discovery of electricity can be said to be a revolution in human history, and its kinetic energy is constantly released every day. The demand for electricity is exaggerated, saying that its function is no less than oxygen in the human world. Without electricity, human civilization will still explore in the dark.
References:
Baidu encyclopedia-electricity