EMF & flux equation (& graph) of AC generator | Electromagnetic induction | Physics | Khan Academy

[@tshomo3092]

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[@showshowtomakefreeenergyge2426]

There is a lot of talk about free energy and how to create it, but there is very little information available on how to do it at the undergraduate level. BACK EMF is one of the ways that free energy can be created, but it is not available at the undergraduate level. This is because it is not taught in school. There are a few schools that offer courses on free energy, but they are mostly at the graduate level. There are also a few online courses, but they are mostly expensive and not worth the money. The bottom line is that if you want to learn how to create free energy, you will have to do it on your own. There are a few books that you can read that will give you some information on how to do it, but they are mostly written for people who already know a lot about electricity.

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EXPLAINED LIKE A PRO! TYSM! BEST VIDEO SO FAR

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[@thanaa6401]

This is one of the greatest things I've ever seen on youtube

[@smtbhd32]

Very amazing, I haven't ever found a lecture like this on AC Generator & Flux. ❤❤

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[@naniidoodles]

I was having a hard time understanding the graphs in my textbook so this definitely helped a lot!

[@upasanamitra8042]

Really informative and was very helpful in clearing the concept. Thank you.

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Tht was really helpful.....I couldn't have got better clarity from someone else...👍👍🙏🏼🙏🏼

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Very deep !!!

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Ahh.... Now that's a satisfying Explanation.

[@qef.lilyum7234]

Thanks this was a huge help for my exam

[@narlod]

I like the explanation on flux change and the vibe...thanks a lot

[@GauriPandey-h1w]

amazing explanation 👏

[@Shreyaagrawal_1657]

This is sooooo brillantly Explained . Thankyouuu so much khan academy 🫀🧠

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Like, like, like and like; absolutely nailed it with the steep slope at the end!

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Best video. Even my teacher was unable to explain it

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Great explanation!!

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[@samsampa2257]

Appreciate Ur efforts. Thanks I've cleared my doubts.Thanks alot❤

[@adnanyousaf6947]

Thank you soo much sir❤ was genuinely finding the answer to why emf is maximum when flux in minimum and vice versa, and you explained it in such a fun way, and surprisingly i understood it completely✨🎀 I can't thank you enough for this!!!

[@HaiderAmer-zh3ll]

really amazing and helpful

[@PremKumar-pz3rh]

Lastly Great explanation about flux vs emf i.e lens law and farade law

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THANKYOU FOR THIS GAWD I WATCHED SO MANY VIDEOS I WISH I FOUND THIS ONE SOONER

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Best on KZbin ❤️

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Voice is very cool❤

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Amazing!!

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Thank you so much sir your explanation was so intuitive❤

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this video makes me easy to understand, thanks sir

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Just wow💙💙💙

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Thank you🎉

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Heyy

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Thank You ☮️🕉️

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Thank you for clearing the concept! @khanacademy

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Excellent way to deliver lecture ..thanks

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Brilliant explanation Sir

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Wow that was an excellent explanation 👏 bravo

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thanks alot answered all my doubts.

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Better than toppr

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keep up the good work!

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Thank you so much for this. Please complete class 12 physics syllabus as soon as possible

[@akshayparandekar8688]

@Khan acedemy: While plotting on Eo on graph at t zero the emf is at it’s high

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[@gizachewbayleyegn4309]

thanks for your lesson

[@asifalamjoy9530]

Your explanation is really handy, but the equation that you have used takes Sin instead of Cos

[@янвв]

AMAZING....

[@georgestanciu5466]

Very simple explanation. I like it. Can be harnessed this back emf, and so to be used as electric power?

[@safeezrahman8823]

Yes back emf can be harnessed from motor.. Even recent electric vehicles or trains uses the back emf to charge up its batteries.

[@georgestanciu5466]

@@safeezrahman8823 But it will be the same amount of power? or less?

[@safeezrahman8823]

Might be bit less, but good part is at least some energy is harnessed instead of total wastage.

[@23_YazakkaJaka]

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[@elmerbuchan3475]

How to get the flux density?

[@saththiyambharathiyan8175]

can we use flux linkage as NBA sin(wt) considering theta to be the angle between flux lines and Area of the loop.....

[@CivilRepair]

I have a request... Can you make a video about Electroosmotic Flow in a channel? Thank you in advance my friend. Excellent work!

[@Uygʻun-q2c]

thanks. sir

[@nomad1286]

thank you brthr

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Thanx ji

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Thanks sir 🙏

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Good 👍

[@mdyaseen8727]

It makes sense

[@htheh7728]

This is the same way voltage is induced in dc generator ? The commutator convert it to dc voltage right ?

[@tennis5126]

In my textbooks it shows EMF max is at 90. Your explanation makes sense but the textbooks I'm reading doesn't. Why would they write it that 90 is at max?

[@sreea2365]

Is it written sin or cos there?

[@riteshyadav1716]

bro to get emf you have to differentiate ( cos omega t ) which becomes (-sin omega t) omega and at 90 sin =1 that's why emf is max at sin. take it this way emf is change in flux at 90 flux changed from max (cos0) to min (cos90) and hence the max emf at 90 edit:- sorry! dude i tried my best but i don't think i've explained it well, but sir in the video did it very clearly, i understood it here only.

[@nomad1286]

several teachers get this wrong... they state maximum emf is when the coil is vertical which is clearly not the case

[@ranabrosranabros4265]

@@riteshyadav1716 well explained

[@ranabrosranabros4265]

cuz it is of sin not of cos

[@techdynamo23]

Niceee👍

[@sushantkhadka6900]

This is equivalent to 1hour learning in class

[@radial_gecko555]

My goat

[@annakempenaar8201]

So basically, E0 is the derivative of the flux, but with a different amplitude?

[@aadithyanrj6757]

Sir I have a doubt. Is the concept maximum emf is induced when minimum flux is linked is true for generators since their conductors get linked by the flux from a pole at a time

[@rudra7986]

😭sir TQ❤

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Thanku sir

[@guuguu7559]

noice thanks

[@christine99185]

❤️❤️❤️❤️