My IQ has been increasing year by year.

Chapter 183 Painting Lines

The sound of the air conditioner's outdoor unit came through the glass window.

Buzzing.

The air conditioning in the room was on full blast, and the blades of the air vents swept up and down, blowing cool breezes toward the desk.

Zhang Qiang sat in the chair.

He was holding a pencil in his hand. The eraser at the back of the pencil was dented and pitted, and even the metal rim around the edge was dented.

A book titled "Summer Breakthrough and Enhancement of Junior High School Physics" was spread out on the table.

The paper is very thin.

On one of the questions on the middle page, the edges were frayed from erasing, and the gray-black pencil marks were smeared on the paper, making it look dirty.

Zhang Qiang stared at the question.

My gaze followed the solid black line down the map.

At a fork in the road, the line splits into two: one goes up and connects to a circle marked with an "X", and the other goes down and connects to a circle marked with an "A".

Zhang Qiang's pencil was pressed down on A.

The pen tip tapped at the fork in the road once, then tapped again.

He grabbed a handful of hair in frustration.

Throw the pencil on the table.

The pencil rolled twice, then hit the base of the lamp and stopped.

"What on earth is this thing?"

Zhang Qiang leaned back, and the chair back creaked.

He turned his head and looked to the side.

Chen Zhuo sat in the swivel chair that Zhang Qiang usually used to play games.

Leaning back against the chair, legs casually crossed.

He was holding a carton of pure milk that Zhang Qiang had just taken out of the refrigerator.

Chen Zhuo bit the straw and swallowed a mouthful of milk.

He didn't speak, he just looked at Zhang Qiang.

"Brother Zhuo, take a look at this."

Zhang Qiang pointed to the workbook on the table, his tone full of frustration.

Is this book written in Chinese?

Chen Zhuo bit down on the straw, not letting go.

She slightly raised her chin, signaling him to continue.

"The book says that the current starts from the positive terminal and returns to the negative terminal, which makes sense to me."

Zhang Qiang picked up a pen and drew the name on the picture.

"But look at this problem! The wire is all twisted and turned, and there are three switches in the middle! S1 is closed, S2 is open, and S3 is closed."

Zhang Qiang used the tip of his pen to poke heavily at the light bulb symbol with an X drawn on it.

"It keeps opening and closing, making the wires a complete mess. When the current reaches this intersection, does it flow to the left or the right?"

Chen Zhuo loosened the straw.

"What does the book say?"

"The book says that current flows through areas of high potential difference, and when it encounters a shunt, it is distributed proportionally according to the resistance."

O

Zhang Qiang rolled his eyes.

"What is potential difference? What does 'proportional' mean? These wires are all the same length, how am I supposed to know which side is larger and which side is smaller?"

Zhang Qiang pointed to another solid line next to him that wasn't connected to anything.

"And this, the book says this is called a wire, the resistance is zero, the current flows through here and not through the light bulb."

Zhang Qiang looked completely bewildered.

"Why should it? Electricity is everywhere, isn't it? The light bulb is right next to it, and it doesn't even bother to go in and take a look!!"

Chen Zhuo looked at Zhang Qiang's indignant expression.

The corners of her mouth curved up slightly.

He didn't sit up straight; he remained leaning back in his chair.

My gaze fell on Zhang Qiang's pen holder, which was crammed with all sorts of stationery.

Chen Zhuo extended his hand.

He pulled a red marker from the pen holder.

He then picked up a blue marker.

This is the highlighter pen that Zhang Qiang usually uses to highlight important points in his Chinese textbook.

Chen Zhuo tossed two pens to Zhang Qiang.

Two pens fell onto Zhang Qiang's physics workbook, landing right on the rubbed circuit diagram.

Zhang Qiang paused for a moment, looked at the pen, and then at Chen Zhuo.

"what?"

Chen Zhuo placed the milk carton in his hand on the edge of the computer desk.

"Put the pencil down."

Zhang Qiang glanced at Chen Zhuo's expression and obediently pushed the Chinese pencil aside.

"Remove the pen cap," Chen Zhuo said.

Zhang Qiang reached out and pulled off the caps of the red and blue markers, holding them in his left and right hands.

"Look at the question."

Chen Zhuo pointed to the symbol representing a battery on the exam paper.

Two vertical lines, one long and one short.

"The longer one is the positive terminal, and the shorter one is the negative terminal. We don't need to worry about where the current goes or what potential difference is."

Chen Zhuo spoke in a calm tone.

"Take out the red pen."

Zhang Qiang raised his right hand.

"The pen tip is on the long vertical line of the battery."

Zhang Qiang did as instructed.

The red pen tip landed on the paper, spreading a little red.

"Draw along the solid line downwards."

Chen Zhuo watched his movements.

"When you encounter a fork in the road, draw both paths. As long as the lines are connected, color them all red."

Following the instructions, Zhang Qiang drew the lines on the diagram downwards with a red pen.

Red ink covered the original black lines.

"stop."

The pen tip stopped in front of a circle with an X drawn on it, and a light bulb.

"When it encounters an electrical appliance, a light bulb, or a resistor, the pen stops and cannot pass through," Chen Zhuo said.

Zhang Qiang nodded, and the red pen stopped in front of the light bulb.

"Go back and paint all the other accessible paths red, and stop at any disconnected switches."

Zhang Qiang moved his wrist.

Less than ten seconds.

The black lines that were originally half of the diagram have all turned into striking red, extending all the way to the front of bulb L1, the front of resistor R1, and behind a closed switch S1.

"Change to a blue pen," Chen Zhuo said.

Zhang Qiang could switch to his left hand, or put down the red pen and pick up the blue pen with his right hand.

"Place the point on the short vertical line of the battery, the negative terminal."

The blue pen tip touches the paper.

"The same method."

Chen Zhuo leaned back in his chair.

"Follow the lines, stop when you encounter a light bulb, stop when you encounter a resistor, stop when you encounter an open switch."

Blue ink began to spread across the paper.

It echoes the red color from before.

The blue wire passes through the ammeter, goes around the lower end of the sliding rheostat, and finally stops at the other end of the bulb L1 and the other end of the resistor R1.

The entire circuit diagram is now reduced to only red, blue, and a few light bulbs and resistors sandwiched in between.

"I'm done applying it," Zhang Qiang said.

"Now, remember three rules."

Chen Zhuo held up one finger.

"First, look at the light bulb in the picture. If the left side of the light bulb is red and the right side is also red, or the left side is blue and the right side is also blue."

Chen Zhuo looked at Zhang Qiang.

"It doesn't light up."

Zhang Qiang was stunned.

My gaze immediately fell on light bulb L2 on the exam paper.

The area above bulb L2, which he had just painted red, and the area below bulb L2, where a wire directly connects to the positive terminal, were also painted red.

Both ends are completely red.

"Is it really not bright?" Zhang Qiang asked.

"If it's not lit, it's called a short circuit."

Chen Zhuo did not explain why.

"Rule number two: if the red line touches the blue line directly, there is no light bulb in between."

Chen Zhuo tapped his finger on the table.

"The battery exploded, there's something wrong with this question, or you drew it incorrectly."

Zhang Qiang quickly glanced at the entire map; the red and blue lines were clearly separated and had not collided.

Rule number three.

Chen Zhuo pointed to the circle with a V on it in the picture.

"The voltmeter is like a big rock; the pen stops there when it can't go any further."

Chen Zhuo then pointed to the circle marked with an A.

"The ammeter is like an empty water pipe; just pass the pen through it and pretend it doesn't exist."

Having said these three points...

Chen Zhuo remained silent.

He picked up the carton of milk from the edge of the table again and bit the straw.

Zhang Qiang kept his head down.

His eyes were fixed on the complex problem that had driven him crazy for half an hour.

He didn't recall any of the theories Lao Zhou had taught in class.

I didn't think about voltage, current, or Ohm's law.

He only saw red and blue.

Question 1: When S1 is closed and S2 is open, which bulbs will light up?

Zhang Qiang looked at the picture.

The left side of L1 is a red line, and the right side is a blue line, with the red and blue lines intersecting.

The top and bottom of L2 are all red lines.

The left side of L3 is connected to the off switch S2, which is not painted.

"L1 is on."

Zhang Qiang blurted it out.

Without any hesitation.

The second question: Whose voltage is the voltmeter measuring?

Zhang Qiang looked at the circle marked with a V.

The left end of V is connected to the red line, and if you look along the red line, it connects to the left end of the light bulb L1.

The right end of V is connected to the blue line, and following the blue line, it connects to the right end of light bulb L1.

It is stuck on the red-blue boundary of L1.

"Measure the voltage of L1."

Zhang Qiang blurted it out again.

The study was quiet for a few seconds, and then the sound of the air conditioner seemed to increase slightly.

Zhang Qiang remained seated, holding his pen, without moving.

He suddenly raised his head and looked at Chen Zhuo.

His eyes were wide open.

"Holy crap?"

Zhang Qiang's lips moved.

"That's the solution?"

Chen Zhuo drank his milk and ignored him.

"Don't you need to worry about how the current flows? Don't you need to worry about the current shunt ratio?"

Zhang Qiang stared at the test paper, his voice unconsciously rising.

"Is it like a kindergarten kid coloring in a book, just swiping in red and blue, and the problem is solved?"

Chen Zhuo loosened the straw.

"Is it finished yet?"

"They're out."

Zhang Qiang swallowed hard.

He grabbed the workbook and flipped to the next two pages.

I found an even more disgusting, and more messy, final question.

Five switches, three light bulbs, and one sliding rheostat.

Zhang Qiang didn't even bother to read the dense text below the question.

Simply pull off the pen cap.

The red pen starts from the positive pole.

When they reached a critical point, they split into two groups.

When you encounter a light bulb, stop; when you encounter a closed switch, pass through it.

Change to a blue pen.

Start from the negative electrode.

It passes through the ammeter and stops when it encounters a resistor.

Less than a minute.

The maze-like black and white circuit diagram was transformed into an extremely intuitive red-blue battleground.

Zhang Qiang looked down at the question.

First question.

He looked at the picture.

"L2 is short-circuited, L1 and L3 are connected in parallel."

Second question.

He looked at the picture.

"Ammeter A1 measures the main circuit, and A2 measures L3."

Zhang Qiang's pen fell onto the table.

He jumped up from his chair as if he'd been electrocuted.

Looking at the red and blue lines he had drawn, he felt an unprecedented sense of intellectual superiority.

The junior high physics that had troubled him for a whole week.

Those invisible and intangible potential differences and current flows.

Chen Zhuo used two highlighters to completely reduce it to a mindless coloring game.

You don't need to understand the principles.

You don't need to understand logic.

As long as you recognize red and blue, and know that you should stop drawing when you reach the light bulb.

All the hidden traps and all the complex parallel and serial connections were exposed.

Zhang Qiang's face turned red with excitement.

He braced his hands on the table and abruptly turned to look at Chen Zhuo.

"Brother Zhuo!"

Zhang Qiang's voice cracked from shouting.

"You must be a god!"

Chen Zhuo sat in the swivel chair, biting the straw, and sipped the last bit of milk, making slurping sounds.

"The immortal wants to use the computer now."

Chen Zhuo held the empty cardboard box in his hand and looked at Zhang Qiang.

"Can you even play this coloring game by yourself?"

"It's so much fun! It's incredibly fun!"

Zhang Qiang nodded vigorously.

He grabbed the exercise book and stuffed the red and blue pens into his coat.

She stood up quickly and left the area in front of the computer desk.

"Brother Zhuo, use it however you like! Do whatever you want! If I don't finish filling out this workbook today, I'm not a Zhang!"

Zhang Qiang carried a small stool and sat down at the coffee table at the other end of the room.

Spread the workbook out on the coffee table.

He uncapped the red pen and, without even looking up, began a frenzied coloring spree.

While applying the ointment, he kept muttering to himself.

"Red, red, stop here."

"Blue, blue, go through."

"You're red from top to bottom, but you're not shining. Go to hell."

Chen Zhuo watched Zhang Qiang get into a frenzied problem-solving state and smiled helplessly.

He turned around to face the computer desk.

With a flick of his wrist, the empty milk carton in his hand traced an arc in the air.

With a soft thud, it landed precisely in the plastic trash can on the corner of the table.

Chen Zhuo withdrew his hand.

His gaze fell on the enormous computer in front of him.

The screen is lit.

The background wallpaper is a low-resolution image from the game "Legend of Mir," showing a warrior wielding a dragon-slaying sword in a pose of slaying monsters.

Chen Zhuo reached out and grasped the gray-white scroll mouse.

Chen Zhuo moved his wrist, and the white arrow on the screen slid across the blade of the Dragon Slayer Saber.

It stopped at the top left corner, featuring games like "A Chinese Odyssey Part Two," "Qianqian Jingting," and "Bubble Fighter."

The arrow passes over these colorful icons.

The screen stopped on a penguin icon wearing a red scarf, and a rectangular login box popped up in the center of the screen.

Zhang Qiang's QQ number was still saved in the input box.

Chen Zhuo pressed the backspace key, clearing Zhang Qiang's number.

I entered a relatively short QQ number, then entered the password, and pressed Enter.

The penguin on the screen started swaying from side to side.

The network connection was slow, and the penguin wobbled for about five or six seconds.

A cough suddenly came from the speaker.

"Cough cough."

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