Faraday's Law of Magnetic Induction or WHY IS THERE ROCK AND ROLL? | Doc Physics

Michael Faraday began the first British Rock Invasion.
I'll define magnetic flux in this video, too.

[@emilianolavecchia5398]

If I knew from the existance of your videos the last year, my life would have been easier studing physics II. I´m from Argentina, I study industrial engineering. I just wanna tell that you are very clear when you try to explain something that its not easy to understand, and that proves that you really know the subject. Keep working hard, you are doing it really well!! PD: I play the guitar too, and the explication of the pickups was really cool, thanks!

[@ormurinnlangi]

Let's just define that very carefully here: "Nature hates change"

[@frankbucciantini388]

Kid with barely middle school knowledge: "daddy, why is there rock and roll?" Doc Schuster: *uses derivatives and the Calculus II definition of magnetic flux* Kiddo: *visual confusion* Hahaha

[@DocSchuster]

This is common knowledge, found in any introductory physics book. I do not go back to original research for such things. Thanks for watching.

[@Shogun1289]

You are an awesome teacher. Thank you, Doc!

[@DocSchuster]

Tio Rico Thank YOU, Tio!

[@dp0813]

Love your videos! I graduated with a BS in EE this past May but i can still watch your vids all day! 👍

[@justinalbrethsen3325]

Love your vidoes Doc, helping a lot of engineers actually understand what's going on.

[@canhnguyen7421]

Thank you for comming and sharing with me ! Thank one million !

[@jacquistockwell5222]

You made this video bearable. Thank you

[@adambirosh5144]

Your a great teacher! I don't know why your videos aren't more popular.

[@soumyadippal3655]

Love your videos Doc Schuster Please make more videos like this :)

[@amondevecasones1929]

What a nice video to learn from not just to study.

[@rsdoyle]

and your presentations are awesome.

[@workforyouraims]

thanks man.i needd a quick review on this.

[@GKProducts]

nice video! also interesting and fun!! thanks doc

[@worried2727]

great video! thanks man

[@kaixuanwanderlust9379]

can you say more about mutual induction?

[@caktalfraktal]

"it's not just any metal" ... It's Heavy Metal *does rock and roll horns*

[@DocSchuster]

Great question. My initial reaction is that you can't consider self-inductance till you understand induction in theory. Surely, there is self-inductance, but this is not yet the time to discuss it. Anyone else have a thought?

[@kexiangvisda8587]

Hey Doc Thanks for the Lecture. Can I ask for your references about this topic? because we will discuss this in class, because our teacher is so busy that he leaves it to us.

[@harrisonbennett7122]

This guy is amazing!

[@imthenextjohngrant]

Do you give a sneaky shout out to Webster, NY when introducing Webers? Anyway thanks for these videos, my college general physics classes are made so much easier by your instruction! Annoying that the teachers don't that I pay for are this good but it is what it is.

[@Hopeless_and_Forlorn]

Jimi Hendrix' music always brought my girl friend to fruition, as you put it.

[@michaelhinchey]

Love the explanation, hate the cliff hanger at the end.

[@nassibsoonathon4582]

Please connect the voltmeter in parallel in the second circuit for the momentary induced current to flow since a voltmeter has an infinite resistance

[@DocSchuster]

Indeed!

[@ZakirHussain-jv4wf]

i am from Pakistan i am bigggg fan of you sir anything which i can not understand in school i watch your video and i under stand it at once thankssssssss!!! your work is tooo good. LIVE VERY LONG!

[@hosoiarchives4858]

. 1 if you wrap copper around a slightly ferrous metal and run current then it causes magnetism

[@Richardjohnkosciejew]

A limited area of knowledge or Endeavour to which pursuits, activities and interests are a central representation held to a concept of physical theory. In this way, a field is defined by the distribution of a physical quantity, such as temperature, mass density, or potential energy y, at different points in space. In the particularly important example of force fields, such as gravitational, electrical, and magnetic fields, the field value at a point is the force which a test particle would experience if it were located at that point. The philosophical problem is whether a force field is to be thought of as purely potential, so the presence of a field merely describes the propensity of masses to move relative to each other, or whether it should be thought of in terms of the physically real modifications of a medium, whose properties result in such powers that are, liken to force fields, having potentially pure characterized by their means of dispositional statements or conditionals, or are they categorical or actual? The former option seems to require within ungrounded dispositions, or regions of space that differ only in what happens if an object is placed there. The law-like shape of these dispositions, apparent for example in the curved lines of force of the magnetic field, may then seem quite inexplicable. To atomists, such as Newton it would represent a return to Aristotelian entelechies, or quasi-psychological affinities between things, which are responsible for their motions. The latter option requires understanding of how forces of attraction and repulsion can be grounded in the properties of the medium. The basic idea of a field is arguably present in Leibniz, who was certainly hostile to Newtonian atomism. Despite the fact that his equally hostility to action at a distance muddies the water. It is usually credited to the Jesuit mathematician and scientist Joseph Boscovich (1711-87) and Immanuel Kant (1724-1804), both of whom was influenced by the scientist, Michael Faraday (1791-1867), with whose work the physical notion became established. In his paper on "The Physical Character of the Lines of Magnetic Force" (1852). Faraday was to suggest several criteria for assessing the physical reality of lines of force, such as whether they are affected by an intervening material medium, whether the motion depends on the nature of what is placed at the receiving end. As far as electromagnetic fields go, Faraday himself inclined to the view that the mathematical similarity between heat flow, currents, and electromagnetic lines of force was evidence for the physical reality of the intervening medium.

[@guitarttimman]

Carlos Santana YES! I loved the commercial. ha ha

[@DocSchuster]

Thanks! Tell your friends before final exams.

[@andrjsjan4231]

Doc Schuster who are you talking or referring yourself to??

[@HazeAnderson]

@@andrjsjan4231 those were pre-"Google owned KZbin" comments that Doc replied to that have since been removed either because the original author removed them or deleted their accounts.

[@andrjsjan4231]

@@HazeAnderson I didn’t understand

[@andrjsjan4231]

@@HazeAnderson who removed them?

[@andrjsjan4231]

@@HazeAnderson and if it was a reply, was is it a main comment now??

[@seanki98]

Hate to be pedantic, but at 5:50, isn't the units tesla meter squared , not tesla per meter squared?

[@altuber99_athlete]

He said it wrongly (tesla per meter squared, T/m^2) but wrote it correctly (tesla-meter squared, T·m^2).

[@kalkeartist3164]

nice video

[@TunedInWithNikk]

so If I wanted to apply this to guitar pick ups, would the magnetic field of the strings change the flux of the pickup and induce a current through the coil and send it to the amplifier?? I just wanted that to be explained a little more thanks :)

[@DocSchuster]

Doc Physics - Electric Guitar Pickup Coil to Amplifier to Speaker Voice Coil Theory

[@OMARYassin1]

thanks

[@Alfster18]

Thanks for the great video! Why does the induced voltage always depend on the area mapped out by the wire? All that area inside the square wire is just empty space so why is that area important? I thought it would just be the flux that actually penetrates the wire itself that would be important?

[@DocSchuster]

This is a deep question. One approach: every loop in the universe is given the challenge of keeping its internal flux constant. The larger the loop, the more attention it pays to flux changes in the universe. Similarly, a larger induced current will be necessary to cause the same strength induced field in a larger loop. Keep up the good questions!

[@Alfster18]

Doc Schuster Thanks Doc Schuster, you are awesome! So am I right in thinking that electromagetic induction is just the result of nature trying to maintain a constant magnetic flux within a loop? Why do you also get an induced emf when you cut flux lines (constant B field) with a conductor? There seems to be 2 situations for induction; one with flux cutting and one with flux linkage using coils.

[@DocSchuster]

You can trace it all back to F_mag = q*v*b_normal. I've got some videos on the earlier bits. Keep rocking.

[@the80386]

nice optical illusion there :)

[@mihirkavishwar6393]

Can you pls explain me in brief why is area a vector? I have had this question for a long time...

[@DocSchuster]

Mihir Kavishwar It is very useful to define the way that area points, that's all. Obviously, the direction 90 degrees from the surface is the only unique direction, so we define it that way.

[@johnlewis6412]

So...I'm converting my 1955 Dodge C3 truck from 6v to 12v and after doing some research I find myself here. One quick question...why does nature hate change and does this have something to do with for every action there is an equal and opposite reaction ?

[@pelesrelewot]

¡Farady!

[@KittyHello292]

hpw did the magnetic field chNge at 2.52

[@johnlbales2773]

A "Whole lotta love" for you Doc! (A LA Led Zeppelin!)

[@someoneonly]

Wait what about the rock and roll ?

[@atulvyas6523]

nice oresentation

[@apexwindowcleaningservices4457]

Flux is a tie fighter

[@bluewhite-ice5440]

I believe that you intentionally spell "Farady". Your Pronunciation doesnt lie.

[@matheworman6308]

There is no paradox and no induction (induction requires changes in magnetic field direction and or intensity)... Due to magnetic field copper disk experiences radial emf and brushes simply collect charges in both cases.. The emf is dynamic (rotation speed dependent) but based on static charge and radial path of the virtual conductor has very small amount of charge but faster the brush action more charges are collected thus emf potential is proportional to the brush rotation... The rule of Lorentz force defines the direction of EMF of the rotating virtual current path... Finally, Faraday's motor effect creates torque, thus no free energy generator possible... Mathew Orman

[@BlackEliteable]

Thanks ,, even it's not enough for that great job you're making

[@rkpetry]

Who spells, Faraday, as, Farady...? (Maybe cover it with a youtube Annotation...)

[@rkpetry]

ca 3:01 (P.S. I meant Annotate "Faraday" over the "Farady"-right on top)

[@DocSchuster]

Raymond K Petry I cannot bring myself to hide my mistake. And youtube won't let me make Spanish Flavor marks, either.

[@rkpetry]

I use Annotations for updating my videos (my venues have rapid contemporary discoveries) and "¡FARADAY!" works when I tried it now... (and I use colors that accentuate the update).

[@altuber99_athlete]

3:41 Nope, if the magnetic field is steady, no current is induced.

[@mohamedzahran3987]

the crazy genius

[@jgodwin247]

I think you labelled your poles wrong. As the current flows through the ferrous metal, it will create a magnetic field in opposite direction. Aka the North side will start at the left, and the south on the right. You however have the direction of the magnetic field right, just wrong poles! :)

[@alisa28998]

omg thank god u saw it too :DD i was thinking about this for ages and started doubting myself...

[@ayadimishra]

jgodwin247 thank you! I was questioning myself here 😅

[@DocSchuster]

At 2:35, I labeled the poles of the magnet correctly. The current is not flowing through the ferrous material - the coil is insulated from it. When the current causes a magnetic field, the atoms of iron tend to line up WITH the field, not opposing it. And the norf pole of a ferrous magnet is the pole that has field lines leaving it, so it is the one on the right.

[@nicholasngzhuoxun385]

Doc Schuster won't there be eddy current flowing through the ferrous metal so as to oppose the b field to the right?

[@JohnnyGarman]

"spanish flava" ha

[@AlainHubert]

I must be a very natural guy, because I hate change...

[@lagentedelnoc]

lets figure it out...its going that way shouuughhhh shooouughhh shouuuuuugggg

[@loiscyphre]

amazing you nerd :D

[@sury39]

spelling of Faraday

[@mariusssssss]

i n f r o n t a n d b a c k a r o u n d

[@MatheusSilva-dragon]

THANK YOU! I also hate this stupid "E"! It only makes things harder!

[@TerryWong12345]

please tune down the tone of your voice! my ear feels pain

[@Pamela777Carlita]

or mommy...

[@aggabus]

You should do a skype visit with quantaman Pmmyq. And theo

[@johnnyLikeVideo]

Gene Wilder

[@collinmurphy1903]

Farady... I think you mean fara-yeaaa!... bahahahahaha!

[@perpetualpolymath5961]

Dude magnetic flux is supposed to be BAxsin(x) not cos(x).If it was cos(x) Maximum magnetic flux is when the area vector is parallel to magnetic field which is rong as the field doesn't cut the area when parallel and thus should be 0

[@bryanhernandez-chambi6230]

Uh your wrong lol, it is cos(x).

[@perpetualpolymath5961]

no if you think about it, emf vs t becomes a sin curve but i see my error in thinking.He chose a different the component is the same the angle is different so he used cos(x1) while i use sin(x2).

[@sidereal6296]

Mo Killem No because you're dot B with the Area VECTOR, which is perpendicular to the area itself

[@dwaynechaps9176]

You spelled FARADAY wrong!

[@pg9193]

hendrix is a king, but VAN HALEN IS A GOD

[@gradecracker]

spells faraday wrong. XD

[@mohamadfazli5575]

Looks like you are confused yourself that's why you can not explain well...