[a / b / c / d / e / f / g / gif / h / hr / k / m / o / p / r / s / t / u / v / vg / vm / vmg / vr / vrpg / vst / w / wg] [i / ic] [r9k / s4s / vip] [cm / hm / lgbt / y] [3 / aco / adv / an / bant / biz / cgl / ck / co / diy / fa / fit / gd / hc / his / int / jp / lit / mlp / mu / n / news / out / po / pol / pw / qst / sci / soc / sp / tg / toy / trv / tv / vp / vt / wsg / wsr / x / xs] [Settings] [Search] [Mobile] [Home]
Board
Settings Mobile Home
/sci/ - Science & Math

Name
Options
Comment
Verification
4chan Pass users can bypass this verification. [Learn More] [Login]
File
  • Please read the Rules and FAQ before posting.
  • Additional supported file types are: PDF
  • Use with [math] tags for inline and [eqn] tags for block equations.
  • Right-click equations to view the source.

08/21/20New boards added: /vrpg/, /vmg/, /vst/ and /vm/
05/04/17New trial board added: /bant/ - International/Random
10/04/16New board for 4chan Pass users: /vip/ - Very Important Posts
[Hide] [Show All]


Janitor application acceptance emails are being sent out. Please remember to check your spam box!


[Advertise on 4chan]


File: 1741836321051611.jpg (20 KB, 306x306)
20 KB
20 KB JPG
How the fuck does electricity work?
It seems like black magic
>>
Just pushing electrons through shit. Electrons and fields.
>>
>>16849614
Go look at a youtube video of a pressure wave travelling down a clear pipe of water (water hammer). The individual water molecules in the middle of the pipe only move a few millimeters but the wavefront travels the entire length of the pipe.
Current in a wire is the same thing.
>>
File: ohm.png (112 KB, 310x394)
112 KB
112 KB PNG
>>16849614
Jeast imagine the water flowing through pipes. Wires are pipes, and water flows from + to -. Faster water flow - higher current.
>>
>>16849614
its the field that does the work; the electrons dont move very far at all.
>>
>>16849627
>>16849639
>>16849652
This doesn’t make any sense. The wire is literally made of copper which has electrons bound together with other copper electrons. It’s not hollow.
>>
>>16849748
>The wire is literally made of copper which has electrons bound together with other copper electrons.
Look up how metallic bonds work.
>>
>>16849741
okay
how?
>>
>>16849639
>water hammer
Thanks. I always think waterfall which is fine for DC, but then I got a little dæmon working the flow value for AC.
Water hammer is self-supporting without lil Max sweating his ass off.
>>
>>16849748
>This doesn’t make any sense.
It does, it's an analogy that helps to understand current if you familiar with water. Many electrical elements, like resistors and diodes can be explained within it. Imagine electrons flowing between the atoms if you want.
>>
>>16849751
by imparting energy to whatever components it is allowed to flow into and through.
>>
>>16849639
>water metaphor
Isn't this really frowned upon as a way of explaining electricity?
>>
>>16849894
No?
It's standard practice for introductory purposes and the analogy goes pretty far.
But, like any other analogy, it has its limitations. Like it doesn't explain induction very well and you have to contrive pretty hard to make it work (a transformer is kinda like a hydraulic press in a way?). But for introductory circuit analysis it's fine.
>>
>>16849894
It is. It's a very surface level analogy and breeds a lot of false assumptions. You should only really use it if you're trying to explain it to a child.
>>
>>16849614
If you move a bar magnet in and out of a coil of copper wire, the wire will have a measurable voltage. That’s you converting the movement of your hand (mechanical energy) into the movement of electrons. Turn that process into a machine and you’ve created a generator :^)



[Advertise on 4chan]

Delete Post: [File Only] Style:
[Disable Mobile View / Use Desktop Site]

[Enable Mobile View / Use Mobile Site]

All trademarks and copyrights on this page are owned by their respective parties. Images uploaded are the responsibility of the Poster. Comments are owned by the Poster.