Induction - An Introduction: Crash Course Physics #34

In this episode of Crash Course Physics, Megneto helps Shini explain what induction is, how it works, and why magnetism is so seemingly complicated.

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[crashcourse]

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

[kimaegaii]

I sped this up to 2.0x speed and I started emitting flux around my entire body. All kidding aside, as a beginner even this is seriously helpful. Thank you.

[heretic]

Straight up studying electronic engineering and I thought this explanation is fast, feel sorry for anyone who doesn't have a background in this.

[ChristianGonzalezCapizzi]

I can't imagine anyone who hasn't studied this before learning anything at this speed.

[madladdan]

Leaves school: Yesss finally I'm done thank you Crash Course you've been good to me!
Starts engineering at uni: Aight I'm back...

[Chloe-kflh]

Lately I've been seeing Shini and Hank more than my own family

[erikziak]

It is easy to watch if you know what Shini is talking about. However I imagine what a mess it must be for someone with zero background knowledge.

[MrThegreatViewer]

Anyone cramming for a physics test right now...?

[jamilladambo]

This is very useful when you want a quick review of your course before final exams not for you to learn afresh. I find review videos very helpful

[duhhuhduh]

I don't know if anyone else picked up on this bit, but she pointed out the opposite of what she was talking about. She said that you can use the right hand rule to know the direction of the current based off of the induced magnetic field, which is right. But, she got the direction of these fields wrong in the second half of the video.

[cooldiys]

Thank you so much, there are a lot people complaining in the comments but I am honestly so grateful that u do videos like these, as they are so much more engaging and I get a lot more out of them than my textbooks

[Sora-cezx]

6:32 I think this is the opposite. The mark Xs indicate the magnetic field goes from the front to the back of the screen.
If you move the loop like this, the total magnetic flow penetrating the area of the loop decreases. So you can guess the current will flow to create the magnetic field to oppose this decrease of magnetic flux. In this case, the current should go in the opposite direction as shown in the video.

Please correct if I’m wrong.

[jasonsterlace]

At 6:32 the current is backwards. I think it was backwards earlier, too. I really like these animations and explanations, I wish PBS would fix the errors.

[enna...]

Every time she says ‘emf’, change it to “voltage” or “potential difference” in your head, they’re essentially the same and it makes it MuCh easier to understand!!

[mannyaustinanderson]

I'm going to end up viewing this video more than once

[CharlesVeitch]

I am still looking at my kitchen hobs with confusion after this video

[modelsin]

Wait so crash course is targeted to high school physics students but then they are sponsored by prudential which is aimed towards seniors planning for retirement??? Not the best place lol

[joshkaye]

Needed to slow this video down to 75% speed to understand it.

[Voidward]

I remember checking these out a while ago. This still kind of feels like someone reading off a script as fast as possible rather than actually attempting to explain things. Sadly, I was actually interested in this topic a few days back and as a newbie to this, would have liked a simple explanation of how to calculate the size of coil and magnet needed to produce a specific voltage, but this really didn't help me in any useful way. I'm actually better off just reading the wikipedia entry because I can at least read that at my own pace and go to the relevant sections. This really should have a more visual presentation format.

[aloevera]

This is an excellent opening. I get some knowledge about the topic which makes me want to read more in depth about then. After reading in depth, I can come back to this and rewatch it, and understand it much better. I love how there's no Time wastage. Hate off to y'all