Random Book

Kawaguchi joins the revision session!

"It's just a circuit, isn't it?"

"It is but... you'll see when we get there. As a quick recap for series circuits: current is the same through each component, the total potential difference of the power supply is shared between components, and the total resistance of the circuit is the sum of the individual resistors."

Nora becomes really confident when he starts explaining this sort of stuff. He'd make for a good tutor. Maybe not a teacher. He's too weak-willed for that.

Plus, some classes are plain unruly... like E Class. If he had to teach that class, there'd be no chance he'd have control.

He flicked to the next page of his revision guide and began skimming the page. Yukimura scratched his head as he took notes down into his scruffy book.

I mean, in my old school, a student stabbed a teacher. He got expelled, like a few others. That class was nicknamed "the Classroom of Chaos". All the teachers who taught that class ended up quitting after a month.

"In parallel circuits, electrical components are connected alongside one another forming extra loops. The rules for this circuit are slightly different."

I was one of the students in that class.

Guess it's why I'm not surprised that I ended up in E Class. I should've saw it coming.

"An electrons will not pass through every component on its way around the circuit. If one of the bulbs break, then the current will still be able to flow around the circuit through the other loop. If one bulb goes out, the rest will stay on."

Considering what I did, there was no way I'd be allowed to be in any other class than E.

I'm surprised they even invited me in the first place.

"Huh, that's more useful than a series circuit. If one of those bulbs goes out, the entire circuit dies. This one at least can continue going." Yukimura said.

"Yep. Parallel circuits are more commonly used in real life for that reason." Nora said. "Since there are different Loop,S the current will split as it leaves the cell and pass through one or other of the loops. An ammeter placed in the different parts of the circuit will show how the current splits."

"So if the total current is 5, when it splits through the different loops, it'd be 3 and 2 or something like that?"

"Yes! You grasp things really quickly, Yukimura-kun!"

"I'm pretty sure it's just because it's easy..."

At least someone's having success with this revision.

"Now onto potential difference in parallel. As energy has to be conserved, the energy transferred around the circuit by the electrons is the same whichever path the electrons follow. Since potential difference is used to measure changes in energy, the potential difference supplied is equal to the potential differences across each parallel components."

Yukimura scratched his head.

"Um... was that too complicated of an explanation?" Nora said. "S-sorry... I just like going in detail..."

"So, in other words... the voltage around a parallel circuit is the same regardless of the loop it goes through...?" Yukimura said.

"Yeah, that sounds correct." I decided to interject. "I mean, voltage doesn't work like a current. If a current goes round the circuit. Voltage is the thing that pushes the current around. It'd be the same push everywhere."

"It looks like you did understand it... phew." Nora said, patting his chest.

"Yukimura-san looks like a dummy, but he's surprisingly adept at this, isn't he?"