Introduction to circuits and Ohm's law | Circuits | Physics | Khan Academy

Introduction to electricity, circuits, current, and resistance. Created by Sal Khan.

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

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[greglee]

This 8 min video is worth more that 3 years of my dumb school... Teachers never bothered to explain those things, they just use A, V, Ohms like it's obvious, and nobody gets it...

[sizwemhlungu]

This guy is good I’m telling you.
Even if you literally are not interested in that particular subject but when this guy is explaining you enjoy and understand the subject. That’s what I call it a Good teacher 😄

[arbbr]

this is like the thing that they failed to explain in school which led me to struggle with this subject for the past 3 years. they literally didn't set the foundation. how can you expect to build knowledge on an unstable foundation? you can't. thank you khan academy, you are doing god's work

[chirag]

PLEASE COME TO MY SCHOOL AND BE MY TEACHER. Ive learnt more from this 9 min video then my hours of science, Thank you. I can take my science test with ease

[GIGATHEBOT]

This Minecraft red stone update is really confusing and overly complicated

hour of reading text books = i kinda get it
10 min video = i totally get this

[seasnek]

Hey Khan Academy i can’t thank you enough for all these great physics videos. They have helped me out so much and have made principles of physics much more simpler and easier to understand than what highschool taught me throughout the years. Keep them up!

[fiveoneecho]

Man, I wish people would learn basic Newtonian physics before trying to use them to explain stuff like this. This video helped me sort out like 3 or 4 bad descriptions of how current works that people explained using backwards ideas of how water would flow or blocks would fall.... Thank you Khan Academy.

[RushilKoshti]

The legend strikes again!I finally understood this after 10 days

[vanoxity]

You are literally the best teacher in the world. I've watched so many videos and yours is the only one that is simple, clear, concise, and actually makes sense. Thank You so much!

[josejimenez]

Wow. This whole time I've been messing with microcontrollers I believed that the flow of electrons was from the (+) terminal to the (-) terminal. What a misconception! Thank you Sal!

[bruh...]

This is a life saver, my teacher doesn't explain any of this and then gets mad we the class doesn't do well.

[isukhdeep]

You're a good teacher ! Love from Indian students!!!

[iez]

Very quality explanation. Will this series eventually get to how electromagnetic radiation is produced by the the change in electric and magnetic fields?

[CarGuyCole]

I'm learning about electricity in 2 classes. a tradesman class (HVAC, plumbing and electrician) and the second year of auto tech. in the auto class, we've spent more than a whole semester "learning" about electricity. literally nothing about cars. I'm taking a single semester of the tradesman class this semester, and we just started covering electricity. In that one day, I've learned more about electricity than the whole semester of "auto tech". This video is rad.

[faizanulhaq]

Excellent...cleared all my doubt...nice job sal

[devigopalakrishnan]

I cant even express how helpful ur videos hv been for me in learning science especially physics. Lv u SAL

[koondoog]

Why does the flow rate decrease in the example here (4:22) but in fluids problems the flow rate stays the same but the velocity increases?

Edit: if current is analogous to flow rate, and resistors only increase the velocity (the flow rate stays the same), what is the point of using resistors/narrower or wider pipes?

[JKNProductions]

I love your videos. really great. any chance of getting 1080p or 4k video?

[ccc]

(I) is for current because it stands for inductance not necessarily because (C) was not available.