Ampère's Law: Crash Course Physics #33

Hans Christian Oersted had just discovered the connection between electricity and magnetism. Meanwhile, a French physicist named André-Marie Ampère was experimenting with some wires, trying to learn more about the connection between currents and the magnetic fields they create. Ampère would discover one of the most fundamental laws of electromagnetism: what we now call Ampère’s Law.

--

--

Want to find Crash Course elsewhere on the internet?

[crashcourse]

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

[mandyberry]

The fact that this series continues to be useful for my college physics classes says something

[msquareddd]

For 5:16, there’s a problem with the direction of the magnetic field. It should be CCW.

[danielmachuca]

Crash Course, I believe there is a problem with the direction of which the magnetic field is going at 5:16. If the current of the wire is pointing up, shouldn't the magnetic direction be pointing counterclockwise? I hope you can fix this. Thanks

[danferno]

The animation at 5:15 actually shows the opposite of the right hand rule, doesn't it? There seems to be a mistake.

[CODandponies]

no matter where i go calculus finds me

[kylewilzon]

I must have watched this 30 times. I finally understand everything. It only took 3 years.

[janneusmaala]

Just had an advanced electromagnetism course final. It's always kind of amazing to see how simple fundamental physics laws really define the core of our understanding of the world. Great video!

[RossMilligan]

They really need to add an annotation at 5:14 explaining that the arrows of field direction are wrong according to the right-hand rule, really messed me up for a second there.

[megableful]

This series is so good. I definitely need a refresher on elec&mag- I hope this series goes on to cover all of Maxwells equations! Perfect speed, perfect animations. I wish this was around when I was learning it for the first time!

[oscarsmith]

Just want to thank you for showing the integrals rather than skipping the math.

[zarboov]

Pretty sure that the arrows of the field direction in 5:14 are backwards.

[markholm]

The animation at 5:24 also gets the right hand rule backwards, as well as the one just previous.

[quemsereu]

I tried understanding this in school so many times, and this video made it so simple ! Thank you CrashCourse. The presenter is great, i have a huge problem with math/physics and the the way you guys teach really helps me. Just wanted to say thanks for the great work.

Btw, english is my third language, so my grammar is not that good.

[shafiquez]

I really like you guys for adding subtitles because it help non-English speakers to understand it slowly ... thanks!

[noreaction]

More videos on electronic and magnetism please, thank you

[mrfortniteballer]

Can you make a Calculus series? I am really struggling with it and these Physics videos have helped so much with Physics! Please reply if you agree

[NjniaVanDerWald]

can we have a course with basic math liek what 1 plus 1 is? i feel this accomodates my abilities in this subjects more.

[amandamoore]

This entire series is helping me review for my finals in college physics! I will continue with this series as I progress into my physics Waves class to get ahead :)

[MarkGerads]

At 7:20, the forces are shown correctly, yet actually result in counter-clockwise motion. The clockwise motion at 7:30 came from the unexplained reverse of the magnetic field.