Formulating units and standards for some new physical quantities is what Li Zexuan has always wanted to do. In addition to these, Li Zexuan plans to let Yanhuang Academy do the standard formulation of some new technologies in the future.

Looking back at the previous life, in order to contain the rise of China, a superpower launched a trade war with science and technology as the pioneer, and some international societies and technical standards committees have to kick out the motherland's outstanding enterprises, in an attempt to collapse the motherland's high-tech industry, at that time, although Li Zexuan was angry in his heart, but he was soft-spoken and his ability was limited, but in this life, Li Zexuan has the ability and more status, so it is necessary for him to promote the development of Chinese science and technology, so that China's scientific and technological strength can stand on the top of the world!

His generation may not be able to do it, but he can lay a solid foundation for future generations.

This is why Li Zexuan can eat and wait for death for the rest of his life, but he has to be busy and tired!

He not only wants to build a military power, but also wants to build a scientific and technological power!!

"Shan Chang, is this ammeter and voltmeter specially used to measure current and voltage?"

After listening to Li Zexuan's third killer project, Li Tai asked with a look of surprise.

Li Zexuan nodded and said, "That's right!" Any physical quantity, must have a measurement scale, a quantitative measurement tool, the follow-up we want to develop more sophisticated, more cumbersome integrated circuits, without ammeter, voltmeter is simply impossible! On top of that, we need to build a meter specifically designed to measure resistance! So Qingque, we have a heavy burden on us! ”

Li Tai nodded sympathetically, and then he frowned and said, "But Shan Chang, how can I make an ammeter and voltmeter?" ”

Li Zexuan knew that it was a bit embarrassing to let a child who had just been in contact with electricity for less than a year make ammeters and voltmeters, so he drew a sketch on rice paper with a pen, and said:

"Oh, green sparrow, look! We can use the principle of electromagnetic induction to make an ammeter. When there is a current passing through, the current passes through the magnetic field along the spring and the rotating shaft, and the current cuts the magnetic inductance line, so it is deflected by the magnetic field force, and the rotating shaft and pointer are deflected.

Since the magnitude of the magnetic field increases with the increase of the current, the magnitude of the current can be observed by the degree of deflection of the pointer. As for the voltmeter, we can derive the current through the above principle, and then connect a resistor with a known resistance value in series, and multiply the current by the scale of the output voltage of the resistor! ”

The ammeter that Li Zexuan mentioned is called a magnetoelectric ammeter, which is the kind that is commonly used in modern school laboratories.

Li Tai nodded frequently while listening, and after a pause, the little fat man asked, "Mountain Chief, where did we get this resistor with a known resistance value?" ”

This question stumped Li Zexuan, if it is placed in modern times, wouldn't it be easy for you to ask him to get a resistor with a known resistance? He can get as much as he wants, but this is in ancient times, most people in this era don't even know what resistance is, where do you ask him to get some resistors with known resistance?

After pondering for a long time, Li Zexuan finally spoke: "Since we don't have a resistor with a known resistance value, let's formulate a standard by ourselves, let the workshop forge a steel block with a length, width and height of one inch, and use it as a standard resistance of one euro to make a voltmeter!" With the voltmeter and ammeter, we were able to measure the resistance of all the devices~! ”

Speaking of which, it's still a matter of standards, there are no standards in this era, so he can only make standards, otherwise a lot of follow-up work will not be able to continue to advance~!

When Li Tai heard this, he was deeply admired: "The mountain chief is wise! ”

Li Zexuan smiled and said: "Qingque, you should encounter many similar problems in the future, you must diverge your thinking, dare to think, and dare to do, otherwise your future achievements will never exceed that of a teacher, because your knowledge is all learned from me, and you can only surpass me if you dare to forge ahead!" ”

To be honest, even if Li Tai is a celestial person, no matter how hard Li Tai works, he will still not be able to surpass Li Zexuan in engineering for the rest of his life, even if he has the opportunity, the probability is only 0.0001 percent!

After all, this product has hundreds of years of engineering knowledge in its head, what can Li Tai surpass?

But Li Tai definitely didn't know these things, and the poor boy nodded energetically: "Tai remember the teachings of the mountain chief!" ”

Li Zexuan nodded with a "look of relief" and said, "Hmm! Go ahead~! ”

Li Tai stood up, arched his hand at Li Zexuan, and then turned around and left with high morale!

"Tsk! No wonder the teachers in the previous life liked to pour chicken soup for the soul on the students so much, because it really worked~! ”

Looking at the back of Li Tai leaving with his head held high, Li Zexuan sighed in a low voice.

If Li Tai heard his words, he would have to vomit blood!

"Fubo, I'm bothering you to arrange someone to help me make something these days~!"

After helping Li Tai solve his doubts, Li Zexuan came to Fu Bo's office and said.

"What is the young master going to do?"

Fauber asked with a smile. Li Zexuan took out a stack of drawings and said a little embarrassed: "Fu Bo, what you do this time is more complicated, you always take a look, if there is anything you don't understand, I'll talk to you in detail later~!" ”

Fauber nodded, and then his whole attention was immersed in the drawing.

After a while, the look of surprise on Fu Bo's face became more and more intense, and after reading the last drawing, Fu Bo couldn't hold back anymore and said, "Young Master, are you going to build a car?" ”

Li Zexuan nodded and smiled: "Fu Bo has good eyesight!" That's right, I really wanted to rebuild a car! ”

Fauber frowned and said, "But what kind of car is this?" Why does it look bigger than a horse-drawn carriage? ”

Li Zexuan replied with a smile: "I call it an electric car, the principle is similar to that of an electric bicycle, it uses a battery and a motor to drive the wheels to rotate, so as to achieve the purpose of moving forward quickly, but this electric car is larger, can carry more people, and requires more electricity!" ”

Fauber paused and wondered: "Young Master's idea is of course good, but in this way, the car will become heavier, and if more people are loaded, this car will be difficult to drive away!" ”

Li Zexuan shook his head and said: "This Fu Bo doesn't have to worry, the motor of this electric car is definitely different from the motor of the electric bicycle, its power is greater, and the traction is also greater. But you must remember to keep it a secret from Shao Ning and Miss Mo! ”

Hearing this, Faberch said, "Young Master, why is this?" ”

Li Zexuan said with a smile: "Fu Bo, this car is a congratulatory gift from me to Shaoning and Miss Mo, and I plan to surprise them when the time comes!" ”

Yan Shaoning is also his good brother, good brothers are married, this congratulatory gift must not be cold, so Li Zexuan thought of such a thing.

When Fu Bo heard this, he suddenly realized, and he bowed his head and said, "I see! Don't worry, the old man will arrange someone to help you build a car, and keep this matter strictly confidential! ”

His old face was full of relief, Li Zexuan and Yan Shaoning, one is his current owner, the other is his predecessor Shaodong, for the Yan and Li families, Fu Bo has always had a deep affection, Li Zexuan is so concerned about Yan Shaoning's marriage, that proves that Li Zexuan really regards Yan Shaoning as a brother, Fu Bo is of course relieved in his heart!

At the same time, for Li Zexuan's explanation of the car-making matter, Fu Bo is more and more concerned, and secretly said that he must mention the spirit of twelve points and stare at the people below to make cars!

"Ke'er, I heard today that hundreds of people flocked to Yanhuang Qianzhuang to save money, I wonder if you can still be busy over there? Do you want your father to send you some more men? ”

In the evening, Li Ke was unexpectedly recalled to the palace by Li Er, and after dinner, Li Er rarely began to care about Li Ke's daily work.

Li Ke was suddenly a little flattered, he arched his hand, and said: "Thank you for your concern, but on the Qianzhuang side, Erchen can completely cope with it, and at noon today, the mountain chief told Erchen that he would recruit a group of guards for Yanhuang Qianzhuang, after all, Qianzhuang has too much money, and if there are lawbreakers who covet it, the loss will be too great!" ”

Li Er nodded thoughtfully and said, "Hmm! This arrangement of Yong'an Hou is very appropriate, so let's do it according to his wishes! Father Emperor is not too much to do! ”

"What did my father say, you can personally inquire about the affairs of Qianzhuang, and the son and the mountain chief are already very honored!"

Li Ke hurriedly bowed his hand.

Although there is a bit of flattery in these words, there is also a bit of sincerity, after all, Li Er didn't care much about Qian Zhuang's affairs before.

"Huh! Don't come to compliment your father, I'm tired of hearing that! ”

Li Er waved his hand, said with a smile, and then asked:

"Ke'er, now that the people are flocking to Yanhuang Qianzhuang and want to save money to earn interest, can Yanhuang Qianzhuang eat so much money? Will you be able to pay off the interest promised to the people when the time comes? Originally, the exchange of Tang Yuan for the people for free was already a concession measure for the money village to withdraw in order to benefit the people, and now the money village not only does not charge the cost of keeping money for the people, but also gives the people interest. ”

Li Ke pondered for a moment and said, "Father, Yanhuang Qianzhuang will definitely not lose money!" The annual interest rate of our deposit to the people is 175, and the annual interest rate of lending money to private merchants is 8, and if we can lend all of it to the merchants, then Yanhuang Qianzhuang can earn 625 yuan a year with this 100 yuan!

There is one point that cannot be ignored, that is, this 100 yuan money was not ours, but the people who came to save money, that is to say, our money village did not use the capital at all, and the people could earn 625 yuan a year with the 100 yuan saved by the people, which is completely a capitalless transaction, and the profit is not low at all! Where can I find such a sure-fire deal? How can our bank lose money? ”

There are many kinds of operating income of modern banks, including deposit and loan interest margins, handling fees, distribution fees, investment income, etc., but the most important thing is to rely on deposit and loan interest margins, which is the foundation of banks. In the same way, the most important way for today's Yanhuang Money Village to make profits is the interest difference between deposits and loans!

When Li Er heard this, he nodded thoughtfully, and then he asked: "What you just said makes some sense, but if there are too many people who come to deposit money, and the merchants who come to Yanhuang Qianzhuang to borrow money are not enough to support such a huge amount of money saved, for example, the people have saved 100 yuan, and Qianzhuang has only lent out consistent money, so won't Yanhuang Qianzhuang still lose money?" ”

Being able to say this proves that Li Er has done a lot of homework before, otherwise he would not have asked such a sharp question.

Li Ke couldn't help but smile at this time: "This father doesn't have to worry about it!" The reason why the policy of redeeming money and saving money to earn interest is that the first thing to do is to pilot the operation in Lantian County, mainly because the merchants in Lantian County are very active, and all kinds of large and small shops have sprung up like mushrooms after a rain, appearing in the cities of Lantian County, and the merchants of the surrounding counties are even more weaving, in this case, the merchants of Lantian County have a much higher demand for money than businessmen elsewhere!

At the end of each month, there will be a shortage of money in Yanhuang Qianzhuang in Lantian County, and now it has been actively deposited by the people, and it is estimated that there will never be a shortage of money in the future, which is very beneficial to the expansion of the Qianzhuang. Prior to this, Erchen and Qianzhuang's staff carefully calculated, and as long as the deposit absorbed according to the current business volume of Qianzhuang was less than 500,000 yuan, he would never lose money, and even make a lot of money! ”

"Oh? Ke'er, are you so confident? ”

Li Er couldn't help but ask with a smile.

Li Ke replied: "Of course, don't forget, father, although the loan interest rate of our bank is higher than the deposit interest rate, compared with other large private loans and interest loans, the interest charged by our bank when borrowing from merchants is really low. Based on this alone, as long as the merchants are short of money, they will definitely come to our Yanhuang Money Village to borrow money. So don't worry about whether you will lose money! ”

"Well, the annual interest rate of the loan in Yanhuang Qianzhuang in Lantian County is only 8, compared with private loans, this interest rate is indeed low and tight!"

Regarding folk affairs, Li Er still has some understanding, and nodded when he heard the words.

This 8 per annum interest rate may seem a little scary to modern people, but for ancient people, this interest rate is simply too cheap! In this era, the monthly interest rate at 10 can be called the "conscience of the industry", the monthly interest rate is 10, and the annual interest rate is directly hundreds, which is a bit too expensive!

Especially during the Sui and Tang dynasties, the imperial court set up a special fund called "public party capital" for official loans, and its function was somewhat similar to that of modern banks. The capital of the public party is managed by the state decrees, and the principal is 50,000 yuan, and the interest is 4,000 wen per month, with an annual interest of about 100.

Therefore, the loan interest rate of Yanhuang Qianzhuang is simply a "godsend" for those businessmen!