Xueba's Sea of ​​Stars

Chapter 67 Bootcamp
The training center is located in the suburbs. After all the students got off the bus, it took about two hours to enter the room to store their luggage, eat, and get acquainted with the whole school.

Finally, in a classroom, members of the 12 provincial teams took their seats according to the seating chart prepared in advance, and took out their pencil cases and notebooks.

On the podium, Wei Tianshuo took a sip of tea to moisten his throat, then took out a brand new chalk and wrote a line on the blackboard.

【Basic Rules for the Finals】

After finishing writing, he turned and looked at the students below and said, "I believe that most of the students sitting below already know the rules of the finals very well, but even if you do, listen to me again."

"first!"

Wei Tianshuo suddenly raised his voice by two notches, almost startling Wu Bin, and the others reacted similarly, sitting up straight and continuing to listen.

"Before that, I want to let you have a general understanding of the difficulty of the finals. Here I will describe it to you from the side. There are two points in total."

Speaking of this, Wei Tianshuo raised his index finger: "First point, as long as you can get any ranking in the finals, then you don't have to listen to the mechanics of the first semester of Peking University, which takes up 4 credits, and you can just take the exam directly."

The students below nodded.

"As for the other point, I believe you are very clear. As long as you get the gold medal, it will be the time for you to turn your back on customers. The admission letters of all universities in the country will be placed in front of you, and you can choose."

"This is naturally a recognition of your learning level, and it represents that among this group of high school students across the country, no one can surpass you in terms of physics knowledge!"

Although Wu Bin already understood these words in his heart, he still felt a sense of enthusiasm when he heard Wei Tianshuo say them, and I believe the other students also felt the same.

"Doesn't it sound wonderful? However, the more beautiful things are, the more people will naturally compete for them. I believe you all understand the difficulty of the semi-finals compared to the preliminaries. Then I can tell you clearly now, the difficulty of the finals Compared with the rematch, it is much more difficult, and your opponent will also be promoted to the national level, so I believe you all understand how strong it is without me."

"Every question in the finals was created to make things difficult for you. You may not find some ideas for the questions in all the collections of difficult questions and real questions. You can only rely on your own knowledge to solve them. There is no Routine can be moved."

After Wei Tianshuo finished speaking, he glanced down and found that most of the students were in a calm state. It is estimated that many people have said these words to them, but one student behaved strangely. He was actually laughing. And it's that kind of excited smile.

'It should be called Wu Bin, isn't it...a bit interesting. '

Wei Tianshuo had already met all his classmates on the bus, and even though they had only been together for a few hours, they had already remembered their names.

After reading the students' reactions, Wei Tianshuo continued.

"I believe that you have all practiced solving all the same types of problems with one method before, and the purpose of our training camp this time is to make you go one step further, so that you can immediately understand the problem after you get the paper and read the questions. What are the solutions that the questioner thinks in their minds, rather than which are the real solutions to this question, which will help you improve your efficiency."

The students below nodded again.

"Okay, I have a set of papers here, you do it first." Wei Tianshuo took out a stack of papers from the podium after finishing speaking.

Students who shout “Ah” when there is a disagreement are unlikely to sit in this classroom, so everyone in the classroom took out their pens and turned on their calculators after hearing that they had to do the papers , entered the state of preparation.

Wu Bin got the papers and started reviewing the questions habitually, and found that the difficulty was not as hell as he imagined, and they were all relatively common types of questions.

"Okay, let's start." Wei Tianshuo announced after glancing at his watch.

Ever since, the only sound left in the classroom was the friction between the pen tip and the paper.

"Stop writing."

An hour later, when he was calculating the fifth mechanics problem with full power, Wei Tianshuo, who had been walking around and on patrol, suddenly shouted.

'Grand... can't you?Is everyone else done? '

After thinking about it, Wu Bin raised his head and looked around. After finding that other people were looking around like him, he finally felt relieved.

At this time, Wei Tianshuo said, "Don't be nervous. You should understand the difficulty of this paper. There is no problem. It's just a test of your efficiency."

Speaking of this, Wei Tianshuo glanced at his watch: "So far, most of the students here can control the time for each question within 15 minutes, which is very good."

Seeing the relieved expressions of most of the students, Wei Tianshuo smiled inwardly. It seemed that all of them were very competitive.

"Then I have finished all the premise, and now I will officially start talking about the final."

"The total score for the final is still 200 points, and the experimental questions still account for 60 points. However, the experimental questions for the final will not be selected from any textbooks. They are all direct propositions. In terms of difficulty, let's take last year's questions as an example."

With that said, Wei Tianshuo returned to the blackboard, picked up the chalk and started writing.

[Use the electronic components in the "Assembled Power Components Box" to design a rectifier filter circuit that can convert AC voltage into DC voltage with maximum efficiency, connect and assemble the designed circuit to make it a DC power supply]

After writing down the experimental requirements, Wei Tianshuo clicked on the first question.

[Draw the design circuit diagram, assemble and measure. 】

"Here, do you have any ideas?"

When Wei Tianshuo wrote the question, Wu Bin was naturally already thinking.

'First input an AC voltage of 12V, then use a bridge rectifier, and then draw a π filter circuit...'

"Wu Bin, this question, you come up and do it."

Just as Wu Bin was thinking, Wei Tianshuo suddenly shouted.

Wu Bin nodded, walked onto the podium, took the chalk handed to him by Wei Tianshuo and began to draw.

(This is a circuit diagram, please raise your paw if you see it.)
After more than ten minutes, Wu Bin clapped his hands and said to the teacher, "The drawing is finished, teacher."

Wei Tianshuo nodded with a smile after reading it, "Please explain the working principle of your circuit diagram."

"Okay." Wu Bin nodded and pointed to the picture and introduced: "The 12V AC voltage passes through a bridge rectifier circuit composed of four diodes and then becomes a DC pulsating voltage, and then passes through a π-type filter circuit composed of electrolytic capacitors and resistors."

As he spoke, Wu Bin made a shrinking gesture, "At this point, the pulsation amplitude of the voltage will be greatly reduced, and it will become a DC stabilized power supply that can be used for load."

Wei Tianshuo nodded in satisfaction, and said: "Very good, you have already got 4 points, and as long as you explain clearly the function of each component in the circuit, then you can take home 5 points for this question. "

(End of this chapter)