Chapter 67 Training

The training center was located in a suburb. After all the students got off the bus, they spent about two hours in their rooms to put their luggage, eat, and get familiar with the entire school.

Finally, in a classroom, members of the 12 provincial teams sat down one after another according to the pre-prepared seating chart 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 piece of chalk and wrote a line on the blackboard.

[Basic rules for finals]

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

"first!"

Wei Tianshuo suddenly raised his voice by two levels, which almost startled Wu Bin. The others had similar reactions and sat upright to continue listening.

"Before that, I want to give you 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."

As he spoke, Wei Tianshuo raised his index finger: "First point, as long as you can get any ranking in the finals, then you don't need to listen to the 4 credits of mechanics in the first semester of Peking University. You can just take the exam directly."

The students below nodded.

"As for the other point, I believe you all know it well. As long as you get the gold medal, you will turn your back on foreigners. The admission notices from all the universities in the country will be placed in front of you for you to choose from."

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

Although Wu Bin had already understood these words, hearing Wei Tianshuo say them still made his blood boil. I believe that the other students were 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 already understand that the difficulty of the semi-finals is much higher than that of the preliminaries. So I can tell you clearly now how difficult the finals are. It will be much more difficult than the rematch, and your opponents will also be promoted to the national level. I believe you all understand how powerful it is without me telling you."

"Every question in the finals is created to make things difficult for you. Some question ideas may not be found in all collections of difficult questions and real questions. You can only rely on your own knowledge to solve them. There is no any The 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 had said these words to them, but one student behaved strangely. He was actually laughing. And it's the kind of smile that's a little bit excited.

‘It should be called Wu Bin, right? It’s kind of interesting. ’

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

After reading the students' reactions, Wei Tianshuo continued.

"I believe you have all practiced solving all the same type of questions in one way before, and the purpose of our training this time is to take you one step further, so that after you get the paper and read the questions, you will immediately understand the answers. The person asking the question is thinking about the solutions, rather than the actual solutions to the question, which will help you improve your efficiency."

The students below nodded again.

"Okay, I have a set of papers here. You guys should do it first." After Wei Tianshuo finished speaking, he took out a stack of papers from the podium.

A student who yells "Ah" when asked to do a paper because of a disagreement is unlikely to sit in this classroom, so everyone in the classroom takes out their pens and turns on their calculator after hearing that they have to do a paper. , entered a state of preparation for war.

Wu Bin got the paper and started reviewing the questions as usual. He found that the difficulty was not as hellish as he imagined, and they were all relatively common types of questions.

"Okay, let's get started." Wei Tianshuo announced after looking at his watch.

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

"Stop writing."

An hour later, while he was working on the fifth mechanics question at full speed, Wei Tianshuo, who had been walking around in patrol mode, suddenly shouted.

‘Gan…no way? Has everyone else finished it? ’

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

At this time, Wei Tianshuo said: "Don't be nervous. You should also understand the difficulty of this paper. There is nothing difficult. It is just to test your efficiency in answering questions."

As he spoke, Wei Tianshuo glanced at his watch: "So far, the students here can basically say that the time for each question should be controlled within 15 minutes, which is good."

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

"Then I've finished all the prerequisites, and now I'll officially start talking about the finals."

"The total score of the final is still 200 points, of which experimental questions still account for 60 points. However, the experimental questions in 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 Supply Component Box" to design a rectifier and 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 finishing writing the experimental requirements, Wei Tianshuo clicked the first question.

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

"At this point, do you have any ideas?"

When Wei Tianshuo was writing the topic, Wu Bin was naturally thinking about it.

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

"Wu Bin, you come up and answer this question."

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

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

(This is a circuit diagram, please raise your paws if you see it.)

More than ten minutes later, Wu Bin clapped his hands and said to the teacher: "The painting is done, teacher."

Wei Tianshuo smiled and nodded after reading it, "Explain the working principle of your circuit diagram."

"Okay." Wu Bin nodded and started pointing to the picture to introduce: "The 12V AC voltage passes through a bridge rectifier circuit composed of four diodes and 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 voltage pulsation amplitude will be greatly reduced, and it will become a DC stabilized power supply that can be used for load."

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