Faraday's Law of Induction

[Whatitdobitch11357]

OMGZ NUOOHUMUSAH SOUNDZ LIKE TERRORIST HE MIGHT BUILD AND AND COME FOR YOUR CHILD!

[SuperSomanshu]

a very nice demonstration

[DanishGiirl]

Thank you

[nosmokemonu]

thnk u sir



[100daviddjc]

Excelent video, I have only one question, how do you put the face of the magnets? north and north facing to inside or one north and one south facing to inside? thanks a lot :-)

[edumation]

@100daviddjc Maximum voltage induced when north or south pole facing coil face

[mynameismatt2010]

If i remember correctly you could move the magnets relative to the coil to get the same result. I wonder if putting very stong magnets inside cars and placing copper coils along freeways could help solve the energy problem. Hahaha. Doubtfull, but it's a nice thought.

[edumation]

@mynameismatt2010 You are right! We could harness energy. Some researchers around the world have developed magnetic suspension systems using your idea. I saw this technology at Osaka University in Japan.

[tadm123]

if you stop moving the coil in the magnetic field the amp meter would read 0 , correct?

[edumation]

@tadm123 Yes

[machinationu]

put that in to a car shock absorber and charge the system

[darknessfalles35]

thank you

[gordinidesigns]

Why do we not have A Faraday car yet, in mass production.  This technology has been around for a looooooong time. Thank you for easily understood teaching.

[pimbadoti]

very practical and  esay to understand thanks for you explanation plse post more of this kind

[Losuol]

Good vid bro!

[TheParadox707]

very good thanks alot

[wowsa0]

Very nice video, I've been looking for a demonstration of Faraday's law. It would have been better if you'd done one moving the magnet instead of the coil, and showing that a current still registers.

[noohumusah]

Pls msdaif i need to know how a Gaussmeter can be built in application to faradays Law i need a brief explanation please..

[msdaif]

A Gaussmeter uses a Hall-effect transducer to measure the magnetic field. The transducer converts the magnetic field to electric field i.e. from unit of Gauss to volts. A current is composed of moving electrons(charges). If a current-carrying surface is immersed in a magnetic field, the surface charges are pushed to the sides of the surface due to Lorentz force and consequently a voltage is produce in the surface. When I feel free, I'll make a relevant video and I will let you know.

[alex6758493485784]

ahhhhhhhhhhhhhhhhhhhhhhhhhhhhh­h

it just clicked the amp meter help visualise that the coil has to be moving to induce the current. thanks for the vid

[jpmorgan187]

damn terrorists

[msdaif]

What's your problem?

[mrfatd]

fuck u

[aninhaodcpt]

@jpmorgan187 lol

[zombiepi]

yay

[amalwithoutme]

thanks for the video

[2b4ts]

hes gonna bloody break the ammeter

[mrmagnetoman88]

This branch of physics is one of my favourite!!

[crippled82]

is the polarization the same with a V meter?

[Juckey2008]

This is the same principal behind the electric guitar and the pickup. The string resonates or vibrates in the electromagnetic field of the pickup which has a magnet and creates a current that is proportional to the frequency of the resonation of the string. Approx a 100 years after Faraday's law was discovered the electric guitar was invented by Adolph Rickenbacker.

[badfender223]

Juckey2008 This is the same principal behind the electric guitar and the pickup.

Superb observation! At the other end, the speaker uses the reverse of this principle to move the cone since current passing through a conductor creates a magnetic field. Combine a moving magnetic field with a stationary magnet and you get lots of strong opposing fields and lots of physical movement. You guessed it! A speaker is just a highly specialized electric motor!

[brakehorsepower1]

thanks alot...this will serve as an aid for my further studies...

[medjugorjemir]

thanks

[SuperCoffin]

thank you

[taravanflower]

Lost is starting to make sense.......

[PurePower025]

seriously dude, i was thinking the same shyt.

cause they have Faraday character!!

[Zookhaarh]

0:38  lol

[electriciansmate]

We owe so much to faraday. Modern life would not exist.

[ducksoup2007]

very true

[LTF85199]

Pretty cool!

[ShishaSteve]

This is super cool

[gottalovesci]

thanks a lot !!

[tony5309872]

thx

[uhyeh]

What's the magnet support made from? Does it have to be solid in the middle?

[msdaif]

Made of stainless steel

[sackcloth777]

I like the demo from school about how static electric charge of an ebonite rod, put near the flow of water from a tap, bends teh water towards the rod, effectively curving it.

This shows that all things atomic, have the electron rotating, and have their own charge, as seen with a battery made up of 2 different materials and an electrolite in between. A copper coin, some wet blotting paper and galvanized iron gives a voltage.

Hidden science by top secret agencies has much more kept from us.

[cwes7675]

Today I learned about faraday's law in class, and I got this really cool idea to place buoys on ocean shores that would pump a coil of wire up and down past an anchored magnet to create green energy. turns out, someone already thought of it :p

[sackcloth777]

you will find that these things are being done by Portugal, as they have sun, wind and ocean waves.

I saw a domentary where they have developed a snake like tube, which moves up and down floating on top of the water.

Of course your idea is different to this and there are variations on it.

Free energy is easily obtainable, if it were not for the BIG BUSINESS keeping us uninformed. Zero point energy is the holy grail and people who tap into this end up having "accidents" their devices disappear

[cwes7675]

thank you kindly for further crushing my hopes for making any kind of patent based on my idea. just kidding.

but seriously, I would like to know more about how oil companies stop alternative energy developments in their tracks. where could I read more about this? If people really want green energy to take full swing, we must not only find the method but protect them from big business interests.

[sackcloth777]

just do some searches about YouTube and the net, you will find much about big business. About the ideas which are quashed. Look at Cold Fusion for example. It is now a proven fact, but those who are working on HOT FUSION get billion dollar grants, and thus as soon as someone tries to get a grant for cold fusion, they are attacked like an angry mob saying crucify him. The jealousy factor of how a few chemists on a few thousand dollars can achieve what big business science can't is killed by them

[ford1979truck]

1 world ...COOL

[Arkthurius]

I have to accept that your clip made me research more about the electromagnetic induction. That is pretty much the reason I wrote many arguments. I wrote many because even the law is "simple", it's very hard to describe it precisely. The EMF is created with a MF and a charge. The induced voltage intensity and polariry depends on the MF intensity and time of it cutting the charges. We could have changing MF not only in intensity but in speed if we wanted to make things more complex. Helpful clip.

[Arkthurius]

I am afraid that this clip is titled wrong because here we dont have any changing magnetic field, but a permanent magnet. If you wanted to demonstrate faraday's law you should have wrapped the coild around and iron and create a changing magnetic field with AC, in other words, you should have made a transformer. In this clip there is not any changing magnetic field, but a permament one.

[msdaif]

You need my clarification:

1. If the coil is held stationary inside the magnet, the flux lines cross the coil

2. As the coil is moved the flux lines crossing the coil become different in quantity and so this is refered to as a change in the magnetic flux crossing the coil

3. A generator or transformer works according to Faraday's Law

[Arkthurius]

OK. A agree with the fact that generators and transformers work with faraday's law. But the 2 ways of induction even being the same they are usually called different. The changing magnetic field respect to time is the most well known. The other one, the popular principal of moving a wire thru a fixed density MF is called motional EMF. They are both based on faraday's law. The law says "the induced EMF in a coil is proportional to the time rate of change of magnetic flux"...continues

[Arkthurius]

since the flux on your magnet is permanent, you need to have a relative movement of your coiland the magnetic field. So, if you move your coil at a constant speed within your magnet you will obtain a constant time of "change" in the magnetic flux. This means the same amount of flux lines cutting the cross section of the coil per unit time, since the flux is permanent and asuming you move the coil at a constant speed. This is why i dont really agree with your 2nd point, because...

[Arkthurius]

the amount of flux lines on the magnet never changes. And I obviously assume the speet to be constant because you know that if it were faster, the EMF would be higher.

[Arkthurius]

Let me just express your second point, you said:

"2. As the coil is moved the flux lines crossing the coil become different in quantity and so this is refered to as a change in the magnetic flux crossing the coil"

By flux lines becoming different in quantity it would be saying that the flux density increses or decreases and we know that this field is permanent.

[msdaif]

Still, it's Faraday's Law of Induction!

[Arkthurius]

It is, I just mean that the statements have to be as precise as they get...

[msdaif]

The purpose was to demonstrate Faraday's Law. This is not a detailed lesson on electromagnetism. Michael Faraday discovered this phenomenon in 1831 and he used a compass, a coil and a magnet. He didn't have a galvanometer and the concept of ac or dc had not yet been developed.

[msdaif]

On the right side of this window, I clearly wrote the statement of Faraday's Law:

"The induced electromotive force in a closed loop equals the negative of the time rate of change of magnetic flux through the loop."

[Arkthurius]

If you have a wire or a coil, Faraday's law states voltage is induced with "a changing magnetic field", in other words this means a change on the magnetic flux density with time. This is the principle used on transformers. There is the principle that says "a wire moving thru a permanent MF, will get a voltage on it". This is the principle of generators, and it is not faraday's law. Anyway, a changing MF induces EMF because of the relative motion between flux lines and the wire.

[toweldemon]

anounce better

[kiddbogart]

great video.

[shole0306]

nice,carr y on

[spellminder]

At the end, he says that in order to induce an emf, then we need to have a changing magnetic field, but Faraday's Law sats that inorder to induce an emf, we need a change in MAGNETIC FLUX, NOT Magnetic field. A change in magnetic field is indeed one way to induce an emf, BUT it's the change in the flux that induces the emf. Anyone agree???

[ShozenDaishi]

A permanent magnet has a MAGNETIC FIELD surrounding it that consists of lines of force, or FLUX lines.

[Cyberphysics]

It is the cutting of the flux lines that induces the EMF (voltage)... which then makes a current flow. Therefore if you keep the coil still near a permanent magnet you don't get a voltage but if you move it (or the magnet) the lines of flux are cut...

[ShozenDaishi]

100,000,000 lines of flux (or one Wb)in one second and 1v will be induced into the conductor. The amount of voltage induced in a coil is directly porportional to the rate of change of the magnetic field with respect to the coil. The amount of voltage induced in a coil is directly proportional to the number of turns of wire in the coil. 1831.

[Arkthurius]

I think to be precise, is the relative motion of magnetic field flux force lines what causes the EMF. If the coil is stationary, EMF can still be induced now changing the intensity of the field with time, like it is done in transformers. Maxwell equations show that the EMF is dependent from relative movement instead of magnetic field strength.

[ianthegeek]

Great example, thanks!

[gstraitman]

clear example great for teaching

[AM2qa]

nice video

[fred7373]

Excellent video.

Simple and informative.

Thanks for sharing.

[Neithax]

Actually the only thing you are measuring now is current induced due to the lorentz force. Because the electrons in the wires are moving with a definite speed v through the magnetic field lines. In Faraday's Law the magnetic flux has to change (or the intensity of the magnet) which here is clearly not the case. Thanks for showing the video but it is actually Lorentz Force!!!

[Arkthurius]

Great observation!

[Arkthurius]

I am afraid I have to withdraw my great observation comment because after having consulted many textbooks and other sources, what faraday means in his law by "a changing" magnetic field is also a magnetic field with constant intensity and a EMF exerted on a charge moving at any speed. The truth is that Faraday's law focuses on the induced EMF exerted by relative movement between a charged particle and magnetic field flux lines, regardless of the magnetic field intensity varying in time.

[Arkthurius]

If faraday's law is valid only when there is a changing MF in intensity, then generators, which work by having a wound rotor energized with DCV and constant DCA and therefore have a fixed intensity magnetic field to induce EMF on the stator bars, don't work based on faraday's law of induction.

[Neithax]

You are partially correct, just as I was. Both the generator and this experiment shows that a motional emf is generated due to the relative velocity of the magnetic field lines compared to your wires. You can get both the motional emf and the emf induced by changing magnetic intensity if you consider faraday's equation in Hertz notation. My error erose because in Maxwell, the motional emf doesnot rise out of the Faraday equation and should be supplied additionally with the Lorentz force.

[SAMJE123456]

If a rock hit the earth and the earth was no more,who would lose more the man that built his own house or the man who played around with coils.

[reymoh00]

thanx heaps for your jobs guys, well done

[ZED74]

Thankyou :))

[youtuubbguy66]

Wow! So clear! Thanks

[icesyncer]

Nice, Thanks alot!

[shahhanif]

well it clear my one concept. thanks mustafa.

[vlsverdx]

GOOD one thnks

[yenna09]

great video!

[telewizorr]

GREAT WORK/THX

[matrixm777]

Thank you for the instruction. That explains some questions I had concerning other energy producing devices.

[TTLLOGIC]

Your accent is annoying

[playnine9]

so is your attitude

[jymbird22]

an illimunating video! great science!