Compared with the first experiment, the second experiment is not complicated. What he wants to do is a simple hand-operated generator. ←, a belt, a gear, a crank, a rotor made of natural magnets, and a coil
's stator.
With Jiang Xingchen's hands-on ability, he quickly completed this simple hand-operated generator. Xian Ning and others watched intently, waiting for the miracle to appear again.
The lead wire was reconnected to the carbon wire. Jiang Xingchen turned the crank and the rotor rotated rapidly in the center of the coil. Then the carbon wire was lit again and then burned out!
"Can electricity be generated like this?" Xian Ning asked in surprise. Just now Jiang Xingchen said that using potatoes to generate electricity means that electrons are transferred from the negative electrode to the positive electrode to form an electric current. But the current experiment also generates electric current, which is different from obtaining electrons.
What does losing electrons have to do with it?
Jiang Xingchen replied: "This phenomenon is called electromagnetic induction. When a closed circuit cuts magnetic lines of force, an induced current will be generated... You may not know that magnetic lines of force are actually invisible!"
Jiang Xingchen said, waving to the private soldier behind him, who immediately handed over a long bar magnet, a piece of cardboard, and a small cloth bag.
"Magnets can attract iron. You should have heard Xian Ning say this!" Jiang Xingchen casually placed the magnet on an iron stand, and it clicked.
The researchers nodded. They already knew this. Xian Ning told them two days after the little pom-pom was brought back.
Jiang Xingchen smiled, placed the magnet on the table, covered it with cardboard, then opened the small cloth bag and placed it on the cardboard.
"This is fine iron sand, look at it!" Jiang Xingchen said, shaking it gently to spread the iron sand evenly. Then he flicked it a few times.
"Oh~" Xian Ning and the researchers exclaimed again, and the iron sand spread on the cardboard turned into arcs. Very regular.
"You see, this is the manifestation of magnetic lines of force!" After Jiang Xingchen finished speaking, he kept silent and let them digest it.
"Sir, it is this invisible and intangible magnetic field line that is cut by a closed wire, which can produce an induced current, right?" After a while, the same researcher who spoke just now asked.
"Yes!" Jiang Xingchen nodded and said, "In fact, not only magnetism can generate electricity, electricity can also generate magnetism!"
Then he took out an ordinary piece of iron, wrapped it with a wire, and connected both ends to the wires from the potato battery.
After a while, Jiang Xingchen brought this ordinary iron block close to the iron sand, and part of the iron sand was adsorbed on the iron block. Then he cut off the power and the iron sand fell off.
"It's really magical!" Xian Ning sighed. The two experiments today touched her very much. This is a completely new energy that will bring about earth-shaking changes to the world. She couldn't help but think of
After hearing the scene Jiang Xingchen described, his heart became even more intense.
Next, Jiang Xingchen asked everyone to gather in a circle. He took out a pen and paper and began to explain some circuit knowledge, what is voltage, what is current, what is resistance, and the relationship between the three described by Ohm's law. What else is called
Series connection, what is parallel connection, and what are their characteristics.
Without the previous two experiments, Jiang Xingchen's explanation to them would be like playing the piano to an ox. It would be strange if they could understand it. But with the experiments as a basis, everyone can understand it roughly even if they don't understand it thoroughly.
It's been another whole day. The sky just stopped when it touched the stars in Heijiang River. Xian Ning and the others still felt that they still had unfinished business.
"Let's study anything tomorrow. This is a big subject and cannot be explained clearly in a few sentences! If you haven't eaten for a day, it can't affect your body!" Jiang Xingchen stood up. He was really hungry and his throat was sore.
It's almost smoking.
As soon as Jiang Xingchen said this, the stomachs of a group of people immediately started to growl. They were all in their twenties, so of course they couldn't stand it without eating for such a long time.
"Eat early! But you can't eat the potatoes on the table!" Jiang Xingchen reminded, he had read the report in his previous life.
The researchers nodded repeatedly, then said goodbye to Jiang Xingchen and left, talking about what Jiang Xingchen said just now.
After everyone left, Jiang Xingchen said to Xian Ning: "Please refine your subjects in the past two days. Although thermodynamics, electricity, optics, and mechanics all belong to the subject of physics, it is better to study them separately! Especially electricity
This piece is about to enter the practical application stage!"
"So fast?" Xian Ning frowned. The researchers haven't even figured out the basic theory yet.
Jiang Xingchen said: "The railway construction is progressing very quickly, and the invention of the telegraph is imminent! The construction of the new city is also coming to an end, and the application of electricity must also be implemented as soon as possible!"
"But the lighting device isn't there yet!" Xian Ning shook her head.
"I will also participate in the further stage, and we will study together! I will start work on the lighting device tomorrow, and the design of the telegraph machine will also be carried out at the same time... By the way, the proofreading of the clock has been completed, and a batch can be produced first. From now on, we will lead the stars
The time algorithm is based on clocks, and (monthly hours) are called hours!"
Xian Ning shook her head and said: "Is this okay? Can tourists coming to our territory adapt to it?"
"It's okay, let's try it first! A clock is much more intuitive than an hourglass. Once the tourists get used to it, I will ask the emperor to change the order time, and it will be subject to ours!"
"Can the Emperor agree?" Xian Ning asked doubtfully.
"Let's talk about this later. If you don't agree, there are ways to disagree..." Jiang Xingchen smiled slightly and returned to the original topic: "In the future, you must pay more attention to safety in electrical experiments. The risk is very high!"
Xian Ning nodded: "I know, I knew it when you asked Xiaoyong to try it just now... But we are quite busy here, with telegraphs, lighting devices, electrical experiments, and clocks! Xingchen, why don't you look for it again?
Come and take over the management of the university personally!”
When Jiang Xingchen heard this mention, he turned around and left: "Let's talk about it later. Let's go eat first. I'm too hungry!"
"Hey!" Xian Ning stretched out her hand to grab Jiang Xingchen, but she didn't expect him to move quickly and trotted out of the laboratory door.
"Huh! How can I keep up with so much work? I don't even have time to study!" Xian Ning stamped her feet angrily.
At this time, Jiang Xingchen's voice came from outside again: "Xian Ning, don't forget to arrange a place for Xin'er and the old man, and medicine should also be established as a subject in the university!"
Xian Ning bulged her mouth in anger, and finally shook her head helplessly and left the laboratory...
After Jiang Xingchen returned to the Lord's Mansion, he took a bite of rice and immediately called Grandpa Fu and explained his subsequent plan.
Grandpa Fu was stunned after hearing this: "Prepare 10 billion topaz coins. Sir, what do you want to do? You need so much money?" (To be continued...)