Ultimate Ampere's Law Review

In this video I review all the common Ampere's Law problems.
Here is a link to the worksheet I'm using.
docs.google.com/document/d/1S...

[@shaminsamiei3357]

I am literally in love with these worksheets.The perfect summary I've ever seen!

[@WeAreShowboat]

So glad they’re helpful!

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When I watch these videos for my final….I feel somehow…everything will all be ok. Maybe it’s because your video on Gauss’s law helped me to get a 95 instead of 50 on my first exam.

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Sir you need to make content for every physics topics

[@siri7421]

you sound EXACTLY like Owen Wilson and I've never been more focused on a physics concept in my life thank you

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i was waiting for him to say kachow

[@HypoLoco]

You explain it so simply, my teacher explains it so complex that I get confused with everything

[@user-nk9fx6zn2l]

This is so incredibly clear and straight forward it has stunned me. It is EXACTLY what I was looking for. Sincerely THANK YOU for not wasting my time with useless rambling.

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I truly adore your videos. The way you explain these concepts somehow clicks with my brain better than any instructor I've ever had.

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Man, you explain everything so well, thank you

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I love your lectures. Thank you a lot. Without you I won't be able to understand these concepts.

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I'll always be grateful for these ultimate review videos.

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You are seriously very good at teaching... Congrats man, wish you had a million views on this video

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Absolutely incredible! I was so lost in class this helped immensely. I might pass physics 2 thanks to you

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[@RalphCullom]

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[@alonsovasquezmaulen7182]

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[@wariacikminecraft321]

thanks man you're saving my life i finally understood what is going on

[@klevisimeri607]

Thank you! Extremely explanatory!

[@johan-rz5bi]

Nice video, it helped me understand ampere's law more

[@Dameng123]

useful for me, thanks I looking forward for a long time until today.

[@theoreticalmindset]

Very very good explanation. Soft voice as well haha

[@anstjd_ys]

Great explanation

[@joeliang649]

你好We Are Showboat先生，我只想说，你是我的物理爸爸。谢谢你的复习视频。I don't know why I typed that in Chinese, but thank you so much for these videos, sir!!! 😇

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What a saviour bro

[@kwiky5643]

Keep making these ! rigourous but not the point where its unwatchable thanks

[@marjorieromero7147]

May you provide explanations to Ampere's Law for word problem examples? Thank you for the informative video!

[@theoryandapplication7197]

thank you sir it is useful

[@mirah9868]

Thanks for this 🙏🏼🙏🏼

[@johanndiethelm]

thank you very much man!

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[@jamalkhatib7610]

Thank you for this topic. Can I get a pdf file?

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[@prashanthgaitonde3451]

very good

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[@penelopepeck5024]

THANK YOU

[@scottcarpenter9993]

Showboat, thank you. But you said early in the video that one "must choose a loop path in which B is constant." Yet later, when doing the solenoid, the loop path cannot possibly have constant B as part of the loop is outside the solenoid. Can you please explain the "choose a loop path in which B is constant." Thank you.

[@WeAreShowboat]

So really I should say “choose a path where B is constant along each part of the loop” For the solenoid we treat the field outside the solenoid as zero so that contribution to the integral is zero. You should imagine breaking the integral into pieces along each constant part.

[@seinfan9]

I'm given a problem to calculate current through a rectangular cross section of a wire and nobody covers how to do this. I don't understand why this is the case.

[@idkmyownname8277]

So my doubt was that can the shape which we decide be three dimensional? So if suppose a few currents were going out and inwards and one was in the plane then could we decide a shape so it enclosed all the currents?

[@WeAreShowboat]

In that case some might not be piercing the area, and the B field would likely not be constant along the Amperian loop or parallel to the loop, but Amperes law should still be true. Just not very useful there.

[@vvise4179]

HOLY SHIT thank youuu!

[@arhamsiddiqui7083]

can you do an ultimate faradays law review

[@WeAreShowboat]

Yes, that’s next on the list

[@AbhiramUpadhye]

Monstrous Biot-Savart's law 👽👺💀 0:10

[@offabender2719]

Where can I find examples of current density which is dependent on an angle ?? Thanks :)

[@WeAreShowboat]

In real life or in textbooks?

[@offabender2719]

Textbooks pls, Ive been having trouble finding any resources

[@Johan-yy9pk]

how do u make it?

[@EmpyreanLightASMR]

0:46 This video is amazing, but I absolutely cannot find any information *anywhere* as to why this dot product's cosθ is never shown. You're taking the magnitude, I believe (and using the RHR for direction), so the closed path integral of B dot dl is supposed to go to |B| |L| cosθ. My question is, where is B parallel to dl, or is it parallel to the normal vector? Maybe I just figured it out lol.

[@WeAreShowboat]

The Amperian path you pick typically either has B in the direction of dL (in which case cos0=1) or B is perpendicular to the direction of dL (in which case cos90=0). In the general case for an arbitrary Amperian loop you’d have to leave cos in there

[@EmpyreanLightASMR]

@@WeAreShowboat Ok that makes more sense, thank you. I also finally noticed the dl *is* the loop, which you show in your diagram-it just didn't register. We good!

[@keylanoslokj1806]

Are you aware of ampere's Cardinal law suggested by physics professor Panos Pappas?

[@WeAreShowboat]

No, what is Amperes cardinal law?

[@keylanoslokj1806]

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[@will_do7616]

how many ebooks did u write

[@WeAreShowboat]

Just one on language

[@will_do7616]

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[@johnfist6220]

I don't understand your explanation for the solenoid. Why would a rectangle have constant B? I would have thought you would have to use the magnetic field lines, which have constant B. And if you do need to use the field lines, would you need yet another formula to calculate the length/ shape of those lines?

[@WeAreShowboat]

The lines run straight down the length of the solenoid if it is infinitely long. Outside near the solenoid the field is vanishingly small if the solenoid is infinite.

[@johnfist6220]

@@WeAreShowboat I see. Well, that raises another problem for me. Most solenoids aren't very long, so how can we justify approximating them as infinite? I could understand if the solenoid had a million or a billion turns, but they tend not to.

[@WeAreShowboat]

@@johnfist6220 The solution will be a good approximation if the length and number of turns to radius is large then this is a good approximation for the B in the center midpoint of solenoid. NASA has a solution online for the finite solenoid if you want to see it. ntrs.nasa.gov/api/citations/19980227402/downloads/19980227402.pdf

[@mixtubemix-tube]

the link doesn't work

[@WeAreShowboat]

I switched it to a pdf form. Does it work now?

[@frogshiba]

@@WeAreShowboat yes, thank you!

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