Magnetic Permeability

[@JohnTaylor-mx5zt]

I've been a degreed Electrical Engineer for 6 years. This is an excellent video and really helped me refresh on some topics that I haven't seen in a while (and don't think I understood in college). Thanks for the great content

[@gogreen2498]

i love bozeman science.always easy to understand.

[@aarondudfield2837]

Absolutely brilliant tutorial.

[@monon_rahman.79]

The videos are short yet easily understandable... Thanks for this...

[@accretionstudios8568]

I like the way you explain this. It's the big picture that gives an intuitive understanding of what his happening. I usually need an intuitive understanding of almost anything before I can really make use of it. Thanks.

[@dr.krishnamurthyramanujam4128]

Wonderful. Don't know how to say thanks. No words. Really superb. Please add more video related to electromagnetisms, electromagnetic waves and ANTENNA

[@filmwedajtubee]

i am always satisfied with these videos thanks

[@TimJinkerson]

Thank you. I'm studying for my radio exams, and this is really helpful.

[@treasuretotrash2067]

You know when your doing a good job explaining something this complicated when a 14 year old can understand. Thanks so much for making this!

[@Thor2233]

Cheers buddy, studying for my exam in electronics in aircraft engineering and just could not get my head around permeability for some reason. Now I can, thanks alot!

[@ProgrammerAsif]

9 years old video. But it feels like a new one

[@samudrachakraborty1550]

nice lecture MR.ANDERSEN

[@alfonzohuerta4103]

Very good explanation, is easy to understand with the video. Congratulations

[@alexnoggle1874]

This video was exactly what I needed! Thank you!

[@MorganCapsule]

Very nice illustrative video. Thumbs up!!

[@jayxiao3]

Thanks for your explanation.

[@kiriup8188]

Really helpful video. I have a question though. I read that "The key difference between magnetic permeability and magnetic susceptibility is that magnetic permeability describes the ability of a material to support the formation of a magnetic field inside itself (as mentioned in this video), whereas susceptibility describes whether a material is attracted to a magnetic field or is repelled from it." Does this mean that materials that support the formation of a magnetic field inside themselves are not necessarily attracted or repelled to the magnetic field? Are there materials that have HIGH magnetic permeability with LOW magnetic susceptibility??

[@tanishkaojha3345]

I am from class10 but it is too easy to understand certain things from the teachers like you.

[@josepeixoto3715]

iron is 200000? everywherev else i see 4000; man, this IS confusing...

[@alwaysdisputin9930]

This video is well explained & clear. TY. Maxwell found the speed of light squared = 1 divided by magnetic permeability x electrical permittivity So notice how speed of light is inversely proportional to the magnetic permeability Therefore the reason the speed of light is so fast is because the magnetic permeability of air (& also: outer space) is small Or in other words: c is big because in air, magnetic field lines are straight (not bent like with iron) Moreover Einstein said E = mc² & c² is huge therefore in every bit of mass there is a vast amount of energy. This is why nukes are powerful. But c² is huge because the permeability of free space is small. Therefore nukes are powerful partly because the magnetic field lines are straight in air

[@OMNI_INFINITY]

Thanks! Still one of the best science channels on youtube! On that toroidal winding where are the poles of that electromagnet? Are the open sides basically similar to the sides (not the ends) of an NS bar magnet?

[@merwinpinto1286]

thanks a lot i have subscribed i love your lecture it sounds like a picture in a theatre

[@MrAmalthejus]

Can you elaborate on those internal magnetic fields and how they distort the external ones?

[@722degrees2]

Talking about ferromagnetic materials which have high permeability. They have something called magnetic domains which are basically smallest magnet that can be formed by that material if you keep on breaking the magnet into halves. When external field is applied, These magnetic domains will align perfectly in same direction. hence creating a magnet itself. Those external field lines now acts as ferromagnetic magnetic field lines and magnetic field lines density is more around its cross sectional area which means that will be the path of least resistance so its get distorted. The perfect analogy might be current passing the through the short circuited wire instead of resistance load.

[@masudraihan973]

thank you, sir.Go ahead and make such kind of awesome tutorial videos. best wishes

[@lathikalathika8092]

Really so helpful sir .Thanks a lot .

[@NikhilSingh-qr4wk]

You are awesome and your videos rock. Thank you so much for taking the time out of your day to do this. Your videos have been very helpful. Just wanted to say you made a difference for me. Thank you very much and have a great day.

[@chandragoudamudigoudra6180]

Nikhil Singh download

[@sergiomachado1188]

Thanks, Paul !

[@LeoFreemanAUST]

Does a toroid produce a magnetic field outside the windings, that can be detected by a magnetic sensor? cf. 3:17. I thought that the field outside of an ideal, tightly-wound toroid (with no "once-around effect") was always zero. However, I also know that if you place a secondary coil around the outside of this toroid, you can induce an AC current in the secondary, even though no magnetic fields should exist there. is this correct?

[@pramod2288]

Excellent job.... Really awesome

[@colinwong3982]

Does the initial permeability of a ferromagnetic material change with magnetic strength?

[@Abdul-kp9nb]

Thanks.

[@jevicci]

Good video, but I wish you mentioned relative magnetic permeabilities of less than 1.

[@ZebreDuDestin]

It is so clear, thank you !!

[@jovanastefanovic6906]

What exactly happened when material with high permeability was placed instead of vacuum, why lines of field are distorted? What's the main difference in affecting on magnetic field lines when we have vacuum and when we have some other material with high permeability instead?

[@omarmoustafa6672]

What an amazing explanation!!!!!

[@ahmedhass146]

Amazing and brief

[@blackcat-mp7kh]

permeability is the measure of the resistance of a material against the formation of a magnetic field, definition Wikipedia and he says its ability of material now I am confused

[@alwaysdisputin9930]

Another really interesting question is why big magnetic permeability = small speed of light i've been trying to answer this & I find it really hard to answer I think it's something to do with how light consists of a changing magnetic field which creates a changing electric field which creates a changing magnetic field & somehow the magnetic part is like a spring a spring takes time to compress eg consider a spring between 2 balls on a pool table. The 1st ball would have to take time compressing the spring before the 2nd ball would start to move By increasing the magnetic permeability you increase the magnetic field, therefore it takes longer to compress the spring. I dunno why there is a spring in the middle of space but I know that the toroid in the video is like a spring - this is because the electric current creates rings of magnetism around the toroid. If you increase the current more magnetic field lines get added. When magnetic field lines get added, Lenz's law says a 2nd electric field will be created which tries to stop you It tries to stop you adding magnetic field lines. It does this by pushing against the current going around the toroid. Thus is like a spring, the toroid stores energy. It converts electrical energy into magnetic energy & if you stop the current in the toroid, magnetic field lines will disappear & again Lenz law will step in to oppose this change. This causes the toroid to use the stored energy to try to keep the current going. By increasing the permeability you make this spring stronger, which slows light down

[@NaeemKhan-qv1jr]

Sir what can I take the value of mu infinity ( high frequency magnetic permeability) for gold or silver.

[@abhijeetdange3947]

Mr bozeman can you tell me how this constant was calculated? as the constant says absolute permeability in vaccum but attaining vaccum in that time was impossible so how did they do it

[@vanshikha7842]

Great explanation!!!

[@amychen2671]

I found the following expression for B (the strength of the induced magnetic field within a material) in a textbook: B = (μ0)H + (μ0)M. Could you explain why the permeability of a vacuum (μ0) is used rather than the material's actual permeability (μ)?

[@princesinggh]

I also searching the same thing ?

[@arupbiswas8288]

Please elaborate the part how electron structure effects permeability?

[@kannanr4294]

Nice explanation sir. One doubt sir what happens the ferrite core is used to conventional iron core transformers.

[@adrianaharisya1257]

thank you so much for this!!

[@Rockyzach88]

So why is the permeability constant of free space needed in the biot-savart formula? And why is it divided by 4pi?

[@lsaha4093]

Rockyzach88 i am also stuck with this question.

[@andresrebata1958]

Idk what the bio savart formula is but thins are divided by 4pi if it involves the surface area of a circle. You can imagine a field spreading out in all directions, thus a sphere, so the intensity of that field will diminish by a factor of 4pi when u multiply it by radius square of course

[@pjthomasthomas9197]

thank you sir

[@imtiazalam719]

Why the Relative permibility of Superconductor is zero?

[@pedrobolsi8366]

Can you describe complex permeability physically?

[@q12x]

very good

[@ExcelledgeYT]

Very helpful thank u

[@faheemkhan-ec9bo]

Love it

[@HoangSonILTechCoLtd]

thank you !

[@ivanbionio]

Thanks!

[@priyansurout215]

Good video

[@RahulSharma-oc2qd]

Woww, thing or topic turned out more complicated for me than I though it would be.

[@sheminjose5481]

so no one can compare permittivity and permeability ?

[@coltennabers634]

ur question doesn't make sense they are 2 different things why would you need to compare them? Er is the relative premittivity of a material -- it's ability to resist an applied electric field by forming it's own internal electric dipoles -- very similar to whats discussed here except it's electric fields not magnetic

[@prakashgouroji495]

Thanks you

[@chinmaykulkarni7835]

If magnet generating electricity how the magnetism and induced emf is related

[@sahandpsn577]

I like it man keep going we need you 🌷🌷🌷🌷

[@arifraihan9759]

LOVED IT

[@fingertipsandcompany2195]

Yeah, cool and helpful!!!

[@mohammedabdulla3538]

thank you

[@user-em9mw9ch3y]

i was kidding. good explanation bro

[@yolandapiotrowicz]

what is the difference between permeability and permenance ?

[@NadaII]

+Yolanda maria piotrowicz Action, reaction. Cause and effect. Permeability gives rise to permeance, inductivity to Inductance, and reluctivity to reluctance. The universal constant. The only real truth. Causality.

[@user-em9mw9ch3y]

nice explanation moustache.

[@godparticle5071]

Fantastic

[@venkateshnagappan7808]

super...thanks

[@ShawnDypxz]

How can vaccum make internal magnetic field . No matter , no atomic or molecular dipoles. So it's permeability should be zero. And Hence the external magnetic field over there.

[@LeoFreemanAUST]

Perhaps the vacuum doesn't actually "make" the internal, field, it is just the applied field in that space, hence the ratio is 1. If a material had a permeability of less than 1, the field inside would be lower than the external applied field, ie magnetic shield. What about a _negative_ permeability? the generated field should be counter to the applied field. Apparently no natural material can do this, but meta-materials can: arxiv.org/pdf/1803.08009v1.pdf

[@omupadhyay1048]

thank u

[@shozabali3304]

only one thing you haven't mentioned the unit for the magnetic permeability.

[@morrisseyman1]

It's H/m, it says it at the top of the screen at around 3.30

[@pexfmezccle]

​@Lafey Fix 'your' spelling (and grammar) "punctiation" lol its punctuation.

[@ziadhussin6894]

nice

[@christomold3142]

youre Awesome!

[@arisoda7497]

4:46 Aluminum or Aluminium? Great video tho

[@user-em9mw9ch3y]

google says "Aluminum" is said in North America but the scientific name surely is "Aluminium".

[@MitsuiSalgadoSaitoct]

i love your videos :)

[@SebastianSkadisson]

Sorry for the facepalms my questions will probably cause and thank you very much for this video. If a material has very low electrical resistivity, will it also be a good magnetic field inductor? How do the rules of electricity and magnetism relate to superconductivity where the temperature also is seen as a factor for the magnetic fields to be strong enough to repell other "magnetic materials", is the primary factor here the state of aggregation of each material in this magnetic interaction?

[@MrKadvaga]

You've probably figured this out by now, but the low temperature creates extremely low resistance which creates very strong magnetic fields in superconductors. Not sure what you meant about aggregation in the materials.

[@TheRojo387]

If you multiply the magnetic permeability of free space by its electric permittivity, you end up with the reciprocal of the square of the speed of light!

[@722degrees2]

now that's amusing

[@keshavkumar1468]

Nice

[@adinjasarevic6778]

¨What about what happens when you put an superconducter into an magnetic field. That is totaly different. why?

[@GASNICABRUNATNA]

The resistance is lower

[@boriscartman]

Instead of iron filings it'd be better to use a ferrocell to visualize those magnetic fields

[@anishabisht4213]

Magnetic susceptibilty is opposite of this?

[@thepunisher3677]

It is basically how much material will become magnetised after applying magnetic field B. It is the ratio of magnetization M (magnetic moment per unit volume) to the applied magnetizing field intensity H.

[@gehadyasser1001]

Thankssss

[@ljoshua2630]

my request is try to teach or explain like professor , do u know diff between u and professors is speed they i'll explain very slowly and usage of grammer that leads to understand anybody easily

[@dylanfloyd9581]

hes talking slow man your going to get a real reality check when you actually go to uni or college, instead of envisioning it

[@user-em9mw9ch3y]

by the looks of it, your grammar sucks bro.

[@philoso377]

Nice video and presentation. u0 permeability of free space? false. u0 permeability of Aether? true. Aether has been ruled out? False Aether has no physical but electrical property, u0, e0. Light propagate with no medium? False. Light propagate through Aether? True.

[@casualBob7]

I can't express enough how I hate myself for deciding to study engineering

[@christinemurray1444]

Magnetic permeability as a term caught on in the 19th century. I don't think the word permeability is a good analogy, I think they should have created a new term.

[@mjayanthi8040]

👍

[@MegaGingerJo]

What does it mean if a material's relative permeability was less than 1? Refering to water from this list www.engineeringtoolbox.com/permeability-d_1923.html

[@MrSuperjo19]

we seet his in 10th in belgium :D

[@RahulSingh-ry9ht]

yeah yeah yeah

[@petlabsramadevi3552]

I couldn't understand your language because you're speaking very fast

[@sohambakshi_]

[@spaff2939]

stop

[@Abdul-kp9nb]

May ALLAH bless💚.

[@arxmechanica]

Technically magnets are not attracted to one another. They are accelerating toward a null pressure point.

[@peterlund832]

thank you!