My IQ has been increasing year by year.

Chapter 64 Brutality

Eight o'clock in the morning.

The lecture hall on the third floor of the administration building of the High School Affiliated to the Normal University.

The early summer sun was already quite bright.

Beyond the canopy of the tall sycamore trees outside, it slants through the glass windows of the corridor.

A bright, trapezoidal spot of light was cast onto the dark green blackboard.

The classroom door was pushed open.

Professor Wang walked in.

He was wearing an old, dark gray jacket with the zipper open, underneath which was a slightly worn plaid shirt.

She was still wearing those old Beijing cloth shoes.

He was still holding that chipped enamel mug with the words "Labor is the most glorious" printed on it.

He walked up to the podium.

Place the tea mug on the edge of the wooden lectern.

Instead of keeping a stern face, he was all smiles.

The wrinkles on his face were gathered together, making him look like an old man who had just finished walking his birds in the park and was in a very good mood.

The six top ninth-grade students below sat upright.

Except for Lin Yi, who was resting his chin on his hand.

The other five boys stood up straight, their backs ramrod straight.

The shockwaves from yesterday afternoon's intimidating speech about real physics are still lingering.

Why are you all keeping such a long face?

Professor Wang unscrewed the lid of the teacup, blew on the tea leaves floating on top, and took a big gulp.

"Did I scare you yesterday afternoon?"

He put down his teacup and glanced at the heads of the brightest junior high school students in the province, sitting in the first two rows.

"I am Wang Yourong. For the next two weeks, you will be under my jurisdiction."

"Yesterday afternoon was for loosening the soil, to get rid of that delicate, genius-like arrogance on you all."

"today."

Professor Wang turned around and took a whole piece of white chalk from the chalk box.

"We're going to take drastic measures now."

He tapped the blackboard hard, making a loud "thud" sound.

"The provincial team training camp will only last for fourteen days at most."

"Short time, heavy task."

"I don't care whether you can digest it on the spot."

"My job is just to cram as much information as possible into your heads."

"You have to swallow it even if you can't."

"You can reflect on this slowly when you get back to the dorm."

The voice just fell.

Professor Wang turned around to face the huge blackboard.

A piece of chalk moved swiftly across the blackboard.

He didn't use a ruler.

Using only the stability of his wrist, he drew a square on the left side of the blackboard.

Next, a second square was drawn diagonally behind.

Four diagonal lines precisely connect the eight vertices together.

A standard three-dimensional cube wireframe with perspective appears on the blackboard.

With a flick of his wrist, Professor Wang quickly drew serrated resistor symbols on the twelve sides of the chalk.

"Twelve identical resistance wires."

Professor Wang's voice suddenly rose in pitch, and he spoke at an extremely fast pace, like a roaring motor.

"All resistance values are R."

"Weld them together to form this cube."

He switched to a red chalk.

On the outermost vertex of the bottom left corner of the cube, a red dot was heavily placed, labeled with the letter A.

A red dot was placed at the innermost diagonal vertex in the upper right corner, labeled with the letter B.

Draw two wires and connect them to a DC power supply labeled U.

"Don't give me any Kirchhoff's laws, and don't even think about using calculus to build an electromagnetic field model."

Professor Wang threw the red chalk into the box.

He turned around and placed his hands on the lectern.

"Let's use Ohm's Law, which you learned in your junior high school textbooks."

"And the most basic knowledge of series and parallel connections."

"Can anyone tell me?"

"The current enters at point A and exits at point B."

What is the total equivalent resistance of this cube?

The classroom fell silent instantly.

Wang, who spoke little, sat in the second row.

The ballpoint pen he was twirling in his hand fell to the table with a thud.

His eyes widened.

He stared intently at the intricate, three-dimensional spiderweb on the blackboard.

Follow the guide wire from point A inwards.

Upon encountering the first vertex, the current branches into three paths.

Then, upon encountering the next vertex, the branching occurs again.

Some converged, while others dispersed.

In less than ten seconds, Wang Huashao felt his eyes start to sting.

My mind felt like it was filled with countless strands of yarn tightly tangled together.

It's impossible to tell which components are connected in series and which are connected in parallel.

The current surged wildly inside, without any clear, unidirectional path.

He picked up a pen.

Try to flatten this 3D shape on a white draft paper.

I want to draw it as a two-dimensional unfolded diagram to find familiar series and parallel structures.

After drawing several boxes and intersecting lines.

The computer completely crashed.

The lines were tangled into a tight knot.

First row, right side.

Zhou Kai's brows were tightly furrowed.

He did not write anything.

Hands clasped together.

He frantically constructed a three-dimensional model in his mind, trying to find a starting point.

However, the twelve resistors are interconnected, and moving one of them can affect the whole network. Even a slight change in one node can completely alter the voltage distribution of the entire network.

Miao Shi'an pushed up his gold-rimmed glasses.

On his draft paper, he quickly wrote down several nodal current equations.

But there are too many unknowns.

Six intermediate nodes and twelve branch roads.

Solving this system of linear equations using junior high school algebra is so computationally intensive it's almost unbelievable.

"You can't tell the series and parallel connections, right?"

Professor Wang laughed heartily at their embarrassed expressions.

The laughter was very loud.

"That's right."

"Because you only have linear, two-dimensional test-taking thinking in your minds."

Professor Wang stepped down from the podium and stood in the middle of the aisle.

"Physics is not about rote calculation; physics is about finding its beauty."

"The world is three-dimensional."

He walked back to the blackboard.

Pick up a piece of yellow chalk.

Following the direction of the current flowing into point A, three identical yellow arrows were drawn on the three branching paths.

Look here.

"symmetry."

Professor Wang's voice resonated throughout the classroom.

"Electric current flows like water."

"Entering from point A, you will be faced with three identical paths, all of the same length and resistance, and their spatial positions are also completely equivalent in terms of topology."

"No road is more special than another."

"Therefore, the total current is divided into three parts in an absolutely equal manner here."

The yellow chalk made three heavy dots on the blackboard.

It produced a dull, knocking sound.

Chalk dust fell in the morning light.

"Since the current is the same, the resistance is also the same."

"Then the potential drop at these three vertices will be exactly the same."

"This is called the equipotential point."

Professor Wang's speaking speed increased.

His eyes gleamed with an almost fanatical light, the pure love that older generations of scholars had for physics.

There is no potential difference between points of equipotential.

"It's like two bodies of water at the same level connected by a pipe; the water won't flow."

"Without a potential difference, no current will flow."

"Therefore, you can consider these three points as being on the same node."

"You can short-circuit them and pinch them together!"

"You can also separate and fold them from the original circuitry!"

The six people below.

My breathing became a little rapid.

No one spoke.

In the classroom, the only sounds were the frantic scratching of pens on paper and heavy breathing.

Chen Zhuo was completely absorbed in it.

He looked at the cube on the blackboard that had been dismantled by yellow chalk.

They felt an undisguised excitement at acquiring such ingenious and complex new knowledge.

The ballpoint pen in his hand flew across the draft paper.

The smooth ball bearings made a soft, tinkling sound as they rubbed against the paper.

Because I wrote too fast and too forcefully.

The black ink seeped through the thin paper, leaving a deep dent on the back.

Chen Zhuo did not copy the original image from Professor Wang's blackboard.

He does not need it.

He followed Professor Wang's line of thought regarding isopotential points.

A collapsing model was quickly built up in the brain.

then.

Quickly reduce the dimensions of that complex three-dimensional cube layer by layer on paper.

The first layer consists of three resistors connected in parallel.

Draw the symbol and write R.

The second layer consists of six resistors connected in parallel.

Draw the symbol and write R.

The third layer consists of three resistors connected in parallel.

Draw the symbol and write R.

The three-layer structure is connected in series.

The tip of the ballpoint pen draws the last horizontal line on the paper.

Write down the final result of %R fluently.

The moment I finished writing.

Chen Zhuo naturally let out a long sigh of relief.

His chest rose and fell slightly.

The physical pleasure of instantly untangling a mess made him feel enlightened.

Because I was gripping the pen too tightly.

The side of my thumb accidentally smeared some freshly written, still-wet black ink.

A faint black stain appeared after rubbing.

But he didn't bother wiping it off at all.

Professor Wang finished explaining the resistance cube.

He didn't even drink a sip of water.

With a sudden flick of the eraser, half of the graphic was wiped away.

Right next to it.

I drew a triangle with an arrow and added a vertical line in front of it.

Do you recognize this symbol?

Professor Wang tapped the blackboard.

"Dipolar body".

"The current can only flow in the direction of the arrow. It's like a one-way valve."

"Reverse? Sorry, the resistance is infinite, this path is blocked."

He turned around and looked at the group of junior high school students who were frantically taking notes.

"The core of the morning's theory class is these two things."

"A symmetrical equivalent circuit and a unidirectional element that is not purely resistive."

The next two and a half hours.

It is a high-intensity, violent, cramming-style indoctrination.

How to find the balance point in a complex bridge circuit?

The recursive thinking of the limit of the resistance of an infinitely long network.

The different topological states of a nonlinear circuit containing diodes when energized in the forward and reverse directions.

Numerous graphics, logical deductions, and extreme physical models.

It was like a torrential downpour.

It slammed down hard on this group of top ninth-grade students.

Professor Wang's lecture was fluent and engaging.

The students below were writing down their wrist cramps.

Wang Huashao felt that his right hand no longer belonged to him.

He rubbed his aching wrists while gritting his teeth and frantically copying from the blackboard.

The tip of the ballpoint pen sparks as it draws across the paper.

Zhou Kai didn't even dare to drink a drop of water.

The water glass on the table was always covered.

His eyes were fixed on the diagram on the blackboard, afraid that if he looked down, the lines on the blackboard would change, and the train of thought he had finally managed to connect would be completely broken.

11:30 a.m.

Dismissal.

Professor Wang left, carrying his teacup, completely satisfied.

A blackboard was left covered with dense white chalk writing.

In the lecture hall.

It looked like a battlefield ravaged by a violent storm.

Wang, who spoke little, slumped in his chair.

Looking at my notes that filled eleven pages.

My mind is filled with a jumble of nodes, arrows, and equipotential points.

They were spinning wildly inside the brain, fighting each other.

He Gui lay slumped on the table, his face pressed against the cold surface, as if all his strength had been drained away.

Miao Shi'an took off his gold-rimmed glasses and rubbed his temples.