Force Between Two Parallel Current-Carrying Wires | Doc Physics

A surprising result. I was surprised, anyway...

[@GrapesgirlViolinSky]

I love how happy you sound It makes me want to like Physics more

[@dillonberger4036]

"wire 1 isn't affected by its own magnetic field THAT'S STUPID!!"

[@indranilsaha7753]

This statement actually cleared all my doubt!

[@marq6325]

@@indranilsaha7753 omg same lol

[@mariahvisvis1509]

It’s giving John Mulaney gets into physics tutorial videos

[@Dilkaranjot1994]

Your enthusiasm is contagious!!! Thanks for the help!!!

[@DocSchuster]

Thanks, Farah! Teaching with passion keeps me awake, too.

[@sapphireblue9209]

Sir I love your energy. You're making me smile while studying physics and that's amazing. Keep it up, thanks

[@Codyyyyyyyyyy]

I really appreciate you making these videos! Your energy and passion really make your videos stand out from other instructional videos out there.

[@white-mb8qv]

Huh...I found this CHANNEL so late..THATS SO STUPID !!..THANKS A LOT..YOUR ENERGY N HAPPINESS IS SO HUGE..MAN......GOD BLESS U

[@edwinodhiambo3351]

9 years later and still the best (funny) tutorial... thanks so much for the great work

[@farahroslend]

I love the passion in your videos Doc! Keeps me awake :D

[@camilamendes5902]

Amazing!! Helped me loads. Subscribed ya. Planning to go through all your videos! You will blow in the sky, trust me !!

[@matthewgonzalez654]

Ahhh got it! thank you so much. Beautifully explained.

[@joshuamulleady63]

EXCELLENT video. thank you!

[@MrAlbashiri]

Thank you so much for the amazing video

[@bwibwi5]

Thank you, you saved my life.

[@klaudiakh3886]

thanks for making a clear-cut explanation

[@fabianwalus1738]

MAAN I have been learning Physics more than three years and i never could understand, but i watched your film and now i know it well, big thanks to you :)

[@asfandyarfarooqi0166]

thanks. that cleared away my last confusion since i gotta go through my physics examination tomorrow.

[@NQcHiKka]

helped clarify and also made me laugh! "thats stupid" lolol

[@zolororono6248]

I've been stressing over this stupid concept because it denied most of my understanding and then I saw this video. Man you have no idea how thankful I am ❤️❤️❤️

[@isihummetli4671]

God bless u man

[@pritiqymaurya464]

First time I understand it clearly. Thank you so much

[@jahansaid6382]

I love the way you explained it :)

[@markkawesa9402]

Fantastic video now i understand it and will never forget it thanks!!!

[@farieshaaffrie4435]

honestly THE best academics video ive ever watched! Made me laugh

[@haze4175]

This is the funniest physics vid I've seen. Also made this super clear

[@LanNguyen-iu3oe]

thanks so much! this makes a lot more sense now

[@dianampm99]

these videos are gold

[@suminamainali5692]

thanks alot............the way of sharing ur knowledge is really awesome

[@washimbari0001]

Really appreciable

[@goku1863]

How can someone make physics so easy and understandable at the same time. Are you god? Physics lord.

[@luongphung2779]

Your vid is awesome. It helps a lot

[@DocSchuster]

Thanks, Cody. I love what I do - I hope you find that, as well.

[@alexhernandez2168]

Awesome explanation.

[@DocSchuster]

Not yet, but that's certainly a gap I could rectify next year. Thanks for the suggestion.

[@aliM-zn7yk]

Thank you so much you made that much easier for me :)

[@dondobruce]

best explanation.. thank you!

[@flrtboy12]

really trust on your physics teacher.....!!, you are awesome dude....

[@fathurrusli6238]

that's awesome, that was really easy to understand

[@purchase602]

THANK YOU BRO YOU ARE SO SIGMA I LOVE YOU THIS HELPED ME SO MUCH OMG

[@cchh556]

finally understood this, thanks

[@devindrarambo3293]

thank you so much man i now started to under stand why the conductor is use for electrical wiring

[@mny353]

thank you so much!

[@prontgamer2294]

Thanks king it's really helpful. I just noticed you are using RHL in a different way, here in Australia, thumb is the direction of the current, the other 4 fingers are the direction of magnetic field and the direction of the force is the normal to the palm.

[@emanmagdi216]

could you do a video that explains force between two permanent magnets??

[@astronomiac8755]

Thanks a lot man. I'm working through Griffiths and they said the direction of the field would be into the page but I didn't understand why.

[@dray1480]

very much appreciated for the help you provide for those in need i respect you very much to spend time and energy making these videos

[@abhikrishnag9806]

grt bro u made it very simple

[@amadissanayake9724]

Perfect and thank you 👍👌

[@ericwall9476]

thank you!

[@JoeDeglman]

Ampere's Law is The Bernoulli principle in a fluid medium. Aka gravity comes from vortices around an axis of flow through a fluid medium. The venturi effect draws the wires together into the low pressure region between the wires, just like elliptical galaxies form between two current carrying galaxies.

[@andevsr]

great! very useful for me.Thanks!! :)

[@stefanmitchell6877]

thank you so much

[@sohamkewalramani4451]

Thanks a lot mann!!!

[@mykulpierce]

Thanks! Helped me solve a 4 thousand old mystery.

[@akrampasha1300]

I liked the video even before watching it.👍

[@jaskiratsinghmehel]

doc, do you have a video on biot-savart law? :)

[@daivikwadhwani4149]

jeez thanks, so if the currents were other way, which direction does the force travel though, for example, if one current is moving in, and the other is moving out THanks

[@satyamchaturvedi6796]

Oh really made me so clear This concept was so Bewildering to me I'm just now so clear about that Thank you so much 👌👌👍👍👍👈👈😉😉😉😄

[@jameschadwick2443]

Sir you are great , I really hope I end up in your class if you teach in a university too.

[@farahroslend]

Wait, is it because the current I2 is the one causing the magnetic flux and this flux it cut by the other wire, 1, to cause a magnetic force on wire1? And that r is used because it gives the magnetic flux density of wire 2, at only the region where the wire 1 cuts the flux?

[@vernonchean4285]

😍😍😍😍 I finally understand it 😍😍😍😍

[@jayashreej3142]

Thank you so much Sir...i was searching for this answer..❤

[@gagansidhubrar3589]

Thnx a lot sir u made my doubts clear

[@MaselaK257]

Hey very helpful video but I have question? Why do the conductors experince the attractive force at all? The forces exerted on each conductor by the other is equal but opposite so I thought that the forces would cancel out and the conductors would remain staionary. Could you please help clarify?

[@MamostaFaisalEnglish]

Thank so much, helped me in 2020 ♥

[@dfc8943]

THANK YOU

[@rohantikoo]

Thank you.

[@tadarneo8739]

love you sir👌👌

[@farahroslend]

Why do we use B2 to find the force on I1? Is it because the I2 wire exerts a force on the I1 ire? If so, then why do we use I1 to find the force on 1? Why not use I2, since it's the I2 wire that's causing the magnetic flux?

[@AsmaKhan-ko2uu]

Thankyou !

[@pannuaseel989]

Thank you

[@anandchitchat6411]

Sir, thanks for clearing my doubt, I was confused with force direction .I was doing mistake by not considering in and out of magnetic field created by each conductor as you did 4:44. Keep on doing good work. !!!

[@Han-dl3ql]

how about difference direction ?

[@abdullahmohammad5613]

I wanna ask a question when using the second handed rule the thumb points in the direction of the magnetic field and the needle always points to the north pole thats strange why don't the north pole of the needle of a compass be attracted to south magnetic field 😕

[@divaynagar1929]

sir can u please make a video of effective point of application in physics if force is varying for a particular surface

[@user-xk7ps7hv5s]

Why it is said that regardless the magnitude of the current, the force will be equal? When I'm using f=bil, I'm not getting the logic.

[@syriansalafi17]

God! ThankYou helped alott !! X

[@HazeAnderson]

And at the last second the video was saved from becoming a carrot currying lesson.

[@cityzen8539]

good. glad you can solve math

[@TerryWong12345]

5:25 what did you mean by velocity out of the screen???? what rule was that that you used - left hand rule or right hand rule ?

[@anangamoon5247]

He used F = q(VxB) for determining the direction of force...

[@sandymorales8250]

awesome

[@camilamendes5902]

Great !!

[@DocSchuster]

I find this an excellent thought experiment, and I have no immediate response. I will mull it over and get back to you if I uncover a response. You can confirm the result I describe experimentally very easily with either a large current or a sensitive setup, so your question is excellent.

[@amalbubble7812]

I have a doubt: Suppose there is a space ship which is traveling very fast. Then inside the space ship would two identical charges(like two electrons) attract each other, because they would seem like current going in the same direction. It seems to me that an electron attracting another electron would be ridiculous for the person sitting in the space ship. taking that speed of space ship is enough so that force of attraction becomes greater than electrostatic force of repulsion.

[@nikhilyadav1455]

I watch many videos...... Now I got it.

[@prabarajkumar3614]

thanks man

[@emredemir4627]

Thanks...

[@BOXEMIN]

Perfect

[@vincentjacob5513]

i just accepted this when my teacher said this. But now i understood.

[@ronaldchoy6950]

6:30 He reminds of Hans Landa in Inglorious Bastards

[@wiza3337]

Doc Schuster In 5:15 you say that we pretend the charges are positive, if they were negative would the forces of the wires be repulsive instead?

[@DocSchuster]

wiza3337 Oooh! Work through it to see!

[@wiza3337]

Doc Schuster Thanks for your quick reply! I got very confused with the right hand rule of velocity/B/Force for positive charges and its variant with the left hand and the one of intensity/B/force... but after watching this video and others of yours i have finally understood it, greetings from Spain!

[@DocSchuster]

wiza3337 Yay, Spain! Thanks for watching. BTW, you'll find that (barring the Hall Effect or other more complicated experiments, you can't discover whether electrons are going one way or mobile positive charges are going the other way. Lots of symmetry here.

[@flinnagin]

are you using conventional or electron flow theory?

[@DocSchuster]

Conventional.

[@flinnagin]

Thanks, so if I use electron I use the "left hand rule"

[@DocSchuster]

Yep!

[@brianmenendez]

strange, if you have two electrons stationary , they repel each other (static force), but if you take these same two electrons and shoot them down a parallel path, they then attract each other (two parallel line currents in same direction). if two static electrons are placed north and south on the earth, shouldn't the electrons attract each other since the are both travelling parallel due to the direction of the earth's rotation (parallel line currents) ?

[@DocSchuster]

brian menendez Ultimately, the question is about how big their attraction is. The attraction because of the parallel currents is only noticeable because the wires that hold the currents are neutral. As such, Coulombic repulsion does not need to be overcome. If you propose that solitary electrons need to be going fast enough to actually be net attracted, you can derive special relativity!!! Woot!

[@brianmenendez]

Doc Schuster what about Birkland currents in space that don't have any wires as a medium,

[@DocSchuster]

brian menendez I just learned about Birkeland currents this morning (thanks!), but it seems like they are in a plasma. I would imagine that there are positive charges up in there that are not moving nearly as fast. As I study the sketches of the currents on Wikipedia, they seem to move apart. This is probably because they follow B field lines, but it also may indicate that they are not particularly attracted. Fun question.

[@brianmenendez]

Doc Schuster huh, your explanation has made me even more confused, sorry

[@haleemahsulaiman2457]

can i have you as my physic teacher.. i would have been one happy student.

[@minoz31]

OMG! Thank you so much! Without this video, I think I will probably failed my quiz tmr. I can finally understand the direction of the magnetic field (: Thanks a lot!

[@periwinkle3435]

i have one doubt. . two wires carrying current attract each other ok i understood that. . what i am trying to ask is that do the transmission lines have this tendency to attract each other?

[@DocSchuster]

periwinkle If the current is going the same direction! I think usually transmission lines have outward current and inward current at each instant, though.

[@dimensionentangled4514]

Is Newton's Third Law applicable, given these are magnetic forces?

[@s.m.musabbinnaseem9376]

Why did you assume the current as a positive charge although electrons are negative so the direction of magnetic force should be found out by curling our right hand fingers from B to v

[@parthsarathidixit5648]

Its a 7 year old video but I just got what I needed..

[@zackm5693]

just be careful, F = ILxB (and the arrangement of the values matters for a cross product, i.e. AxB = -BxA)

[@DocSchuster]

Excellent point.