This semester, I started learning about circuit diagrams.

resistors, circuits and bulbs, series and parallel, etc.

After learning this, I learned that the light bulbs at home are all connected in parallel, and one line controls one light bulb.

There is a simple parallel circuit experiment in the book, when Mr. Zhang went up to the front of this experiment, he told us that this experiment is one of the experiments to be tested in the high school entrance examination, and the next class will take us to the laboratory to learn, on-site operation, and require us to memorize this circuit diagram by heart.

Before the start of the cultural class of the high school entrance examination here, we will take two courses first.

Physical education and laboratory classes.

Thirty points for physical education and fifteen points for laboratory classes.

The experiment is an on-site lottery, which may be drawn for physics experiments or chemistry experiments. It's a random event, so we have to practice both chemistry and physics experiments.

The thought of going to do an experiment in the next class made me very excited.

It's been two years since I came to Lingnan Middle School, and I haven't been in the laboratory yet.

Unconsciously began to fantasize about the appearance of the laboratory, could it be a magical place like the polyhedral laboratory in "Happy Planet"?

I don't know if I can build a robot? Or a model airplane or something?

I began to eagerly await going to the lab.

Before the start of this semester, Gao Lei transferred to another school.

The representative of the physics class was changed from Gao Lei to Duan Chenrui.

Student Duan is really good, and his grades have been chased into the top ten in one semester.

He managed to attract the attention of the homeroom teacher and the physics teacher. Maybe boys are really born better at logical thinking than girls? All I know is that boys don't seem to be as diligent as girls, and they don't like to memorize subjects, such as political history.

However, the homeroom teacher still instilled this concept in us from time to time, saying that it is better to have no distinction between arts and sciences in junior high school, and when we reach high school, we will find that most boys study science, and girls study more liberal arts.

When he said these theories, I was only convinced. Because there are also many girls in the class who do well in mathematics, the view that girls are not good in natural physiology is no different from "patriarchy" for me, I always feel that this sentence contains contempt, of course, I am really not very good at mathematics.

But I'm pretty good at physics, so that's definitely up for debate.

It's finally time for the physics lab class.

We carried my physics book, crossed a tree-lined alley, and then turned a corner, and we came to the school's laboratory building.

In fact, this building is the upper two floors of the lecture hall, but the lecture hall is used more, and I have not had the opportunity to visit the upper floor in the past two years.

Walking up two floors, we saw several classrooms, three or four. The red paint door is a little peeling, mottled with stripes, and a rusty iron sign hangs on it - Physics Laboratory (II).

Mr. Zhang took a bunch of keys and opened it several times before opening the door.

It seems that it has not been used for a long time.

"It's here, there are circuit materials on each table, you guys familiarize yourself with it first, and I'll teach you on the spot later, and teach you how to connect circuits."

The teacher opened the door, and with that, he walked to the podium and began to look for some materials he could use.

I looked at this laboratory, and it was very different from what I had imagined. The surrounding walls were rough and yellowish, and many places were starting to fall off, and some crumbs of lime had fallen from the ground.

This is reality, not dreamy or glamorous at all.

There are more than a dozen large desks in the classroom, each with sockets next to it, and switches. The table top is some circuit frames, and some small boxes have some wires and light bulbs next to them.

They were randomly divided into several groups, with about five people in small groups.

A few of us were curiously fiddling with these parts, and at this moment, I seemed to be back to the afternoon when I accompanied my brother Ling Ming to dismantle things, and piles of parts were scattered on the table.

I hadn't noticed it just now, but when I looked closer, it turned out that the table area was covered with a thick layer of dust.

As soon as the little hand was put up, a paw print could be seen immediately.

There are a few sisters who love to be clean and bring small packets of napkins with them, and the whole class passes them on, and the first time they come to the laboratory, it turns out that they mainly wipe the table.

Looking at everyone's busy work, I was thinking, you say, how much will it cost to build a slightly more complete physics laboratory?

"Ahem, let's stop wiping the table first, look at me here first." Teacher Zhang, who was standing on the podium, spoke, and we all looked at him.

It turned out that he had already laid out a full version of the circuit according to the experimental circuit diagram in the book.

He patiently explained: "This is the circuit diagram for the experiment we are going to do.

When you restore the circuit diagram, you must first figure out whether the circuit is connected in series or parallel, and count how many circuit components are needed, resistors, switches, bulbs, etc......

Also, be careful not to make a short circuit.

Short circuits are very dangerous, and it is easy to burn out circuits, etc.......

He patiently admonished, his eyes full of concern, for fear that we would hurt ourselves because of our weak hands-on ability.

After he finished speaking, he dismantled the circuit again, assembled it in front of us, explained it at the same time, and waited for him to teach and play, and there were about twenty minutes for us to play.

When I was a child, I only knew that it was a fun thing to use batteries and wires to make light bulbs, but now I know that it has been a small physics experiment.

Today, the goal of all of us in the class is to work together to make the light bulb in front of us light up, and the experiment will be considered a success.

The first thing to do in our group was not me, but Zhang Ying, who seriously made it for a while, and completed a series of operations with three times and five divided by two. Finally, the switch and power were turned on, and the bulb really lit up.

It was nice that the whole group applauded and cheered together. It is really a commendable thing that the first physics experiment in my life was so successful so smoothly.

Later, every student in our group experienced a wave of this experiment one after another, except for a few students who were careless and did not do it carefully, and the light bulb only lit up after the correction, most of them basically passed at one time.

The first time we did a physics experiment, we didn't have any expectations, but Mr. Zhang taught very carefully and seriously, and we began to study and operate seriously, and achieved good results.

Regardless of the difficulty of this experiment, we have a great sense of accomplishment when we do physics experiments for the first time, so at least we can successfully stimulate our interest in physics experiments and have a good effect.

Teacher Zhang patiently checked table by desk, corrected what we did badly, and tried to let every student learn this experiment.

I have to say that the classroom atmosphere of standing in the laboratory and chatting while picking up wires is really much better than sitting in the classroom and taking notes.

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