Xia Hongsheng has no confidence in himself, but he has in Li Tai.

If you want to bring Li Tai to the field of electric power and electromagnetism, you must first have electricity.

A few days after the two left the palace, the things and people that Xia Hongsheng wanted were sent to Jingyang by the guards.

Also with him was Li Tai. He was filial to his father and son in the palace for a few days, and then came back to Jingyang together.

"What do you want these people to do?" When Xia Hongsheng looked left and right at the few people sent by Li Shimin, Li Tai leaned over and asked in a low voice.

Xia Hongsheng didn't answer him, but just said to those people: "Come with me." ”

After that, Xia Hongsheng took everyone to the well, pointed to the winch wheel on the well, and said, "You go and untie the rope, tie a big stone on it, and then come to the winch to see who shakes it for a long time." ”

"Brother Sheng, what are you asking them to do this?" Li Taibai was puzzled.

"Naturally useful." Xia Hongsheng said to him, and then turned his head to Qi Yong and ordered: "Qi Yong, you are watching here, this is comparable to endurance, according to the length of time you shake, write down the name." ”

Qi Yong commanded: "Yes, Childe!" ”

Xia Hongsheng nodded, and took Li Tai out of the well and to the study.

"Sit." Xia Hongsheng pointed to the chair, and after Li Tai sat down, he said: "Electricity is a natural phenomenon in nature. Lightning, frictional electricity, these are all electricity. The role of electricity is so great that it is foreseeable that in the future world, electricity will be almost as important to human beings as oxygen is to human beings. But in order to use it, we must first understand the nature of electricity and how it is artificially made. ”

Li Tai was stunned for a moment, then his eyes lit up, and he immediately sat up straight excitedly, and took out a notebook and a charcoal pen in his hand.

Seeing Xia Hongsheng's surprised eyes, Li Tai smiled: "I'm used to it, I carry a pen and paper with me, and sometimes I suddenly think of something, so I quickly write it down to save me from forgetting." Inspiration is often only a moment, a good memory is not as good as a bad pen, this is still what you said! It's easy to get dirty. ”

"That's right, you can find me some graphite for me, and I'll make a pen that's easier to use and cleaner than charcoal." Xia Hongsheng said, and then said: "Electricity is a property of the repulsion and attraction generated between subatomic particles like electrons and protons. It is one of the four basic interactions in nature. There are two phenomena of electron motion: we say that an atom that lacks electrons is positively charged, and an atom that has excess electrons is said to be negatively charged. Well, listening to what I just said, you can know that if you want to understand the nature of electricity, you must first know what is an atom, what is a subatomic particle, what is an electron, what is a proton......"

Xia Hongsheng spoke carefully, and Li Tai listened carefully to the memorization.

There was also a pile of paper in front of Xia Hongsheng, which Xia Hongsheng had written down in the past few days, and all the content he could recall about electricity.

Xia Hongsheng's physics was cut off in high school, and later he was in the town junior high school before going to the village elementary school, because one of the original physics teachers was admitted to the civil service, Xia Hongsheng took half a semester of physics classes. After the school hired a retired physics teacher to come back to substitute teaching, Xia Hongsheng never touched the physics textbook again. As for electricity, I only know the ones in physics textbooks, which are just scratching the surface.

But these "skins" are enough for the people of this era to open up a new field for them and guide them to open up a new world.

There will be smart people, persevering people, based on these "skins", to delve down this road. As long as you persist in this way, one day, you will reach, or even better, the height of the later life in which Xia Hongsheng was originally - in the later life, isn't it also the unremitting study of generations of people, from the beginning of not knowing anything, to reach that height?

Xia Hongsheng was going to fill in these things into the physics textbooks of Jingyang Academy, and in the explanation to Li Tai, Xia Hongsheng remembered a lot of things, and the information sorted out was more organized and organized.

And Li Tai is also like a young seedling that breaks out of the ground, trying his best to absorb the spring rain of knowledge.

Before you know it, it's more than a month.

"Master, why did you come outside today?" Li Tai came to study again, but Xia Hongsheng didn't talk about it this day, but took Li Tai to the backyard.

Xia Hongsheng smiled mysteriously and said, "I made a thing, and I'll teach you to take a look at it today." ”

After a detour and going out through the back door, Li Tai found that the few wrestlers that the emperor had given to Xia Hongsheng were waiting there.

As they approached, the wrestlers dodged away, revealing a shelf behind them. I saw that there were two wheels, one large and one small, on the shelf, wrapped with copper wire, and connected to something like a crank on the winch of a well.

"Is this ......" Li Tai was puzzled, turned his head to Xia Hongsheng and asked.

"Hand Generator." Xia Hongsheng replied with a smile.

"Generator!" Li Tai looked over in shock.

Xia Hongsheng shook his head: "Today I am going to teach you a great principle. It is on this principle that the generator is realized. ”

"Yes! Master! Li Tai immediately turned into a good student, and took out his notes as soon as he flipped through them.

"When a part of the conductor of a closed circuit moves to cut magnetic inductance lines in a magnetic field, an electric current is generated in the conductor, a phenomenon called electromagnetic induction." Xia Hongsheng said to Li Tai, and when Li Taifen finished writing and writing, he said: "According to this principle, I made this hand-cranked generator." The principle of electromagnetic induction is the basic principle of making generators. Any different form of generator changes the different forms of motion that cut the magnetic lines or the different power that supports the motion. For example, the principle of the generator I made is that the conductor is constantly moving in a magnetic field, cutting the magnetic inductance lines back and forth, and then generating an electric current. Because the power for the conductor to do the cutting motion comes from the hand-cranked rocker, it is called the hand-cranked generator. Because its power is hand-cranked, the force is not large, the speed is not high, although it can generate electricity, but the current generated is very small. However, it can also be used as a prototype for generators. ”

“…… Master, according to this electromagnetic induction phenomenon, as well as what you just said, isn't it possible to keep sending electricity as long as the conductor keeps moving back and forth in the magnetic field? Li Tai asked: "Is it possible to get a larger conductor and try to connect it to our steam engine, let the steam engine push it back and forth non-stop, and then we can try to arrange the magnetic field around, then we can make more current!" ”

Xia Hongsheng was stunned, lying down, this understanding ......

"Yes, the phenomenon of electromagnetic induction is the basis of the principle of the generator. But to make a generator, it's not as simple as you think. Xia Hongsheng said: "But your general direction is right. Thermal power generation is based on such a principle. You can experiment with this. Now, let's take a look at Datang's first 'artificial' current! ”