Chapter 494 Talking Paper Pot

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When he came to the research institute, Liu Hanshao was cheered and sought after by the little demons as usual, and because of the delicious food, he also received high praise from Huang Yueying. Then Liu Hanshao took a sheep towel and grabbed Huang Yueying's little head and rubbed it violently.

Huang Yueying didn't bother to swallow the delicious food into her stomach, seeing that she had become like a yellow-haired lion king, her good hair was all fried, and she didn't know whether she wanted to cry and laugh, or beat the master.

Liu Hanshao also can't help it, because it's not popular to cut invention now, Sima Yi and Pu Yuan's hair is too short, and I'm afraid that rubbing it won't have much effect.

Then, just before Huang Yueying went violent, Liu Hanshao said seriously: "You saw it all, right?" This is for the teacher...... I taught your second and third uncles back then...... Friction Electrification ...... Upgraded! ”

Huang Yueying swallowed the delicious stuff in a mouthful, but she still didn't think about whether to beat the master or not, but saw Liu Hanshao and said mysteriously: "Actually, this is static electricity, under normal circumstances, it is useless." ”

After all, Pu Yuan was the youngest, and he couldn't hide something in his heart, so he immediately asked, "Master, is there still electricity, which is very useful for birds?" ”

Electricity?

Pretty much. Anyway, that thing is very dangerous, whoever moves will be electrified.

"Xiao Yuan is right, today the master is going to take you to do a very interesting experiment, so that you can know useful electricity!"

Even if it is the kind of little horn that can shout and collect tattered horns, it has to use electricity, so Liu Hanshao is really in a hurry.

While holding the delicious food, the little demons found copper plates, lead plates and copper wires, as well as teacups, water and salt according to Liu Hanshao's instructions. Then Sima Yi was responsible for connecting the copper plate and lead plate with copper wire; Pu Yuan was responsible for forming a circle around the teacup, and then put the copper plate and lead plate that Sima Yi had connected on the teacup; Huang Yueying was responsible for stirring salt into the water, and asked Liu Han from time to time how much salt was appropriate?

Where does the master know how much to pour?

Whatever.

After all the preparations were made, Liu Hanshao drove the little demons far away and personally added salt water to the teacup. The little demons are puzzled, master, you just pour water, as for such a trembling, are you careful? Then, the little demons gathered around one after another, and were surprised to find that the water in the teacup slowly bubbled out a lot, and more and more.

Liu Hanshao pretended to be casual and said: "Dewei, you go and see how the copper wire reacts." ”

Sima Yi walked to the other side of the table, pinched up a copper wire and looked at it, and said very honestly: "Master, there is no reaction." ”

Liu Hanshao quietly pulled Pu Yuan and Huang Yueying back two steps, and asked again: "What about the other one?" ”

When Sima Yi heard this, he picked up another copper wire carelessly, and then the whole person was violently excited, and he jumped backwards with lightning speed, and shouted in a crying voice: "Master, bite someone!" ”

This move not only frightened Pu Yuan and Huang Yueying, but even alarmed Dian Wei and Yang Xiu, who were standing guard outside, and the two of them jumped in directly. Especially Yang Xiu, he still has a lot of thoughts in his heart.

What do you mean?

Han Shao bit Sima Yi?

Look at the pitiful baby, is this a new way for the master to punish the apprentice?

Because Sima Yi was so excited that he had already pulled the copper wire out of the teacup and threw it on the ground, Liu Hanshao saw that a new one had come

The test subject pointed to the copper wire on the ground and said to Yang Xiu, "Dezu, put it in the cup." ”

How clever is Yang Xiu? Although he didn't understand what was going on, looking at Sima Yi's pitiful strength, he expected that there must be something strange in it, so he carefully picked up the copper wire and threw it back into the teacup from a distance.

Seeing that the whole plan failed to succeed, Liu Hanshao said impatiently: "Go out, go out, you all go out, don't delay my brother to teach the apprentices!" ”

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That's right, this thing that Liu Hanshao made with his apprentices is actually a saltwater battery. There is a copper plate and lead plate in each cup, which is equivalent to a battery, because there are many series connections, so the voltage is high. But now there is no way to measure the voltage, so I can only use apprentices to do live experiments.

Of course, Liu Hanshao is not purely to rectify Sima Yi, after all, this thing is very dangerous, if Sima Yi wants to have a good time in the future, he has to give him a long memory. If you are bold and careless, you can't be an electrician, and if you are not careful, you can be sent there, but a special talent like Sima Yi who has diaper experience is the best choice.

"Be it again", although there is no electricity protection now, but the energized copper wire is put in the water cup, like Sima Yi, it will be pulled out, so don't worry about the real danger.

Or that curiosity kills the cat, obviously Sima Yi has been electrified once, but taking advantage of Liu Hanshao's drive away from Yang Xiu, Pu Yuan has already pinched the two copper wires, and actually said to Liu Hanshao excitedly: "Master, it's numb, it's so comfortable!" ”

Is your baby here for electrotherapy?

Liu Hanshao's brain was black, and he finally began to reflect, is it right or wrong to get this thing out and let a group of little babies mess around?

"Go to your father and get a round iron ring!"

"Huh? What's the hoop? ”

When Sima Yi invented the compass, he originally used a natural magnet, but the natural magnet was brittle and not easy to polish and form, Liu Hanshao told him that the iron needle was rubbed with the magnet and magnetized, and the iron needle could also become a magnetic needle, so the compass that was mass-produced later used was magnetized iron needle.

Now Liu Hanshao wants to make a small horn, he needs to use a ring magnet, and he doesn't know if it will work with a magnetized iron ring, anyway, it's an experiment, take your time, no, and think of another way.

At this time, it was getting late, and after explaining the various materials needed by the apprentices to prepare the next class, Liu Hanshao went back to the palace first. However, early the next morning, just after dawn, Sima Yi drove a wooden ox and a flowing horse and rushed to Yong'an Palace with Pu Yuan and Huang Yueying. Without him, I was afraid that the master would have too many things to do, and I forgot to teach them.

The apprentices' move made Liu Hanshao feel very gratified, what a good baby, how hard to work and how much to love learning!

Well, maybe these little demons don't love to learn, they just want to play. But who's to say that isn't what learning should be?

Under the kind and kind care of the queen's wives, the little demons had breakfast with the master, and then dragged the master straight to the research institute.

The finished iron ring has been rubbed on the magnet by Sima Yi and Pu Yuan in turn for half the night, and the enameled copper wire has also been prepared, just waiting for Liu Hanshao to wind the coil. Don't underestimate the skills of the craftsmen of the Han Dynasty and the extravagance of the aristocracy, don't forget the "golden thread jade clothes", "golden thread" is the "golden thread", so the enameled copper wire was made, and the craftsmen said that there was no pressure.

First let Sima Yi fix the ring magnet on the magnetic conductive column, which is commonly known as "T iron", Liu Hanshao

Take the enameled copper wire and put it on a hollow cardboard roll, wrap it around and around it, ready to make a "voice coil". When Huang Yueying saw the meeting, she handed it over to her to wrap it, and then she took Pu Yuan, found paper, and prepared to make a "paper cone".

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After all, it's too advanced, and although the little demons know what they should do, they don't know what they do. Huang Yueying also asked very rigorously: "Master, how many circles does this have to wrap around?" ”

Liu Hanshao said casually: "Just wrap it around a hundred times." ”

Then Huang Yueying lowered her head and glared, counting how many circles Liu Hanshao had wrapped before.

The "paper cone" or "sound cone" is made with a large round piece, digging a small round hole in the middle, and then cutting off a part of it and folding it into a trumpet shape. The "basin rack" was prepared by the apprentices yesterday, and it was compared with the "paper basin" to be able to buckle in.

After everything was ready, the little demons surrounded Liu Hanshao, and saw that the master first fixed the magnetic conduction column and the basin frame together, and then put the "voice coil" in the middle and tried it, sliding without hindrance, and then glued it with the sound film and paper cone and put it on the basin rack. Next, there are folding rings, crimping, and buckle dust covers...... Finally, after the two copper wires were drawn out of the basin rack and fixed, Liu Hanshao said with a serious face: "Go and bring the battery." ”

The "battery" is the teacup filled with salt water yesterday, Pu Yuan was not afraid of anything, took the order and left, and immediately jumped up, Sima Yi and Huang Yueying looked at Liu Hanshao's face, and they were a little frightened.

However, today's experiment was done by Liu Hanshao himself, so he rejected Pu Yuan's kindness and only used a teacup.

After connecting one thread first, and waiting for the other thread to touch it lightly, this extremely simple, mostly papier-mâché trumpet emits a faint electric sound.

Maybe it's because the voltage is too low, add two more cups.

Liu Hanshao asked Pu Yuan to run to the cafeteria again, grabbed a handful of millet, and put a few grains on the small speaker. After the power was turned on, the apprentices were surprised to find that the thing made by the master would not only make a "stinging and stinging" noise, but also make millet grains jump and jump.

Pu Yuan was excited to jump with the millet grains, but Liu Hanshao said: "Baby, don't be too happy too early, we're only halfway there." ”

The four masters and apprentices have been busy until now, and they are indeed only half done from a "complete small speaker", because it is only a "speaker", and if you want to send out the sound of tatters from the small speaker, you also need a "microphone", that is, a "microphone".

Microphones and speakers are actually similar, except that one collects sound waves and converts them into radio waves, and the other converts radio waves into sound waves and plays them back.

After making a "dynamic microphone" and connecting it with the previous speaker, Liu Hanshao asked Sima Yi to take the speaker and walk away, away from him, and then shouted softly into the microphone: "Dewei." ”

At first, it may have been close, and Sima Yi could hear Liu Hanshao's own voice, so he didn't react, and turned around to ask Liu Hanshao what was wrong. Liu Hanshao had no choice but to say that you go farther, and then go farther. When the existing copper wire was pulled to the head, Liu Hanshao covered the microphone with both hands and shouted again: "Dewei." ”

Sima Yi was finally horrified to find that it was the paper basin he was holding in his hand calling his name!

Isn't this a hell of a daylight?

Frightened, Sima Yi threw away the speaker he was holding at once, and was extremely frightened and angry, and hysterically let out a torture from the depths of his soul: "Foul master, this thing will call, can't you tell me in advance?" ”