Electric Current: Crash Course Physics #28

Показать описание

So, electric current works like a river... kinda... Instead of flowing based on elevation, electric current works a little differently. But it's a good metaphor. In this episode of Crash Course Physics, Shini talks to us about electric current, voltaic cells, and how we get electric charge.

--

--

Want to find Crash Course elsewhere on the internet?

Рекомендации по теме

Комментарии

We made quiz questions to help you review the content in this episode! Find them on the free Crash Course App!

crashcourse

Very well done, bravo. Still have no idea how electricity works though, but that's just because I'm not very.. bright.

victorcachat

These "fast" videos are perfect for reviewing and getting everything neat and simple in ma brain after the lesson.

fluffyrawan

she has a lot of potential to be a rapper

SomyaJain

hey all,

just something to consider if you feel like she's talking too fast,

it's actually the editing. the editor is cutting the start of each new vocal passage per scene so that it cuts in right after the presenter stops talking.

so there are very few breathing bits.

it's a way of maintaining consistent audience attention by subtly changing dynamics, but it does also kind of irritate people who prefer a normal human conversational pace.

LoganAKASpiderhands

Stop spilling hate the name is 'CRASH COURSE' for a reason. It is fast on purpose

kushagrasharma

While water pressure and flow are a handy way to mentally model electrical voltage and current, it is worth noting that electrons themselves move very slowly (only millimeters per second) through a conductor in the direction opposite the current ("electron drift speed"), while electrical current moves close to the speed of light. The way to picture this is, that the electrical conductor is a tube, packed full of balls from one end to the other. When you push a ball (electron) in one end of the tube, it almost instantly forces a ball out the other end of the tube. The speed at which that pressure information is transmitted from one end of the tube to the other is the speed of electrical current, while the speed at which the balls move through the tube is electron drift speed.

daemn

I think that crash course music theory would be a good topic.

oregongebus

Wow her explanation is just so good! No one can ever explain things like her and with such passion and enthusiasm.
Simply loved it

aaryan

I love learning about electricity! It's been a while since I studied it back in college. I had total forgotten about the coulomb! Ohm's law, however, is as fresh as when I learned it for the first time. Keep em coming CrashCourse!

freddiea

Man, so much work goes into making this.. thank you!

alt

Watt the heck? Never expected such current and up-to-date info. This video is like a joule because it’s so great.

doso

These videos are so good. Thank you so much Crash Course & PBS!!

Maria-nuyo

I love this video, very descriptive!

covered a lot of the ambiguity I had to deal with, while I was scratching my head trying to learn this stuff!!!

Bravo! Good job!!!

I always love the stuff Crashcourse does; your teams seem very professional and funny.

I do wish that you had gone into the relationship between amperage and current a bit more though🙁

niaschim

You guys could really do a Crash Course series on electricity. Watching my friend build his digital pinball machine with solenoids, circuit boards, and switches, I realized how little I know how to apply what's taught in a high school (or even college) physics class.

Activsoul