eddy currents and electromagnetic braking explained

In this video I use Lenz Law to explain how eddy currents form when a piece of metal passes through a magnetic field. This is often also referred to as electromagnetic braking.

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[ericzhu]

Beautiful explanation definitely cleared up any misconceptions I had. That top view diagram is something that helped a lot with understanding why it slows down.

[kaka]

brilliant explanation, this is what most teachers lack clarity in explaining...

[lpfilter]

Perfect and very clear explanation, it is always helpful to take a look on internet when studying a hard to visualize concept

[JH-ityr]

Thank you so much! I just had my class yesterday and my professor didn’t really make it clear. Now I get it!

[S-MKim]

I like your induced magnets on the plate. Their orientations are perpendicluar to the direction of motion but still they do the job. clever.

[timytli]

Thank you so much Paul. A couple of resources I'm using with my current y12 didn't put this as clearly and I was beginning to doubt my own understanding!! As always, so useful for the course.

[mg-nxsr]

honestly BRILLIANT absolute dominance on the side of clear demonstration as soon questions popped inside my head they where answered thanks a ton sir and have a GREAT life :)

[cwt]

The video is great! but what are direction of forces act on metal strip causing it to brake? the motion of the metal strip is left and right, but the repulsive and attractive force due to poles of magnet & metal strip is into and out of paper. So, what forces are acting in parallel to the motion of metal strip tp cause braking ? thanks

[leocarlton]

My phsyics teacher is an absolute clown. Can't explain anything.
You sir, are fantastic. The conceptual framework is brilliant.

[goodlife]

Thanq sir for clearing my doubts
It is really helpful . Thank you again

[johnwicks]

❤do u have any video demo of An huge Magnet fly by your Carbon fiber plate / Graphite plate / Graphine plate above & which one will stopFastest.!!😊

[bigred]

Strange question but would it be possible to take a hollow circular metal core rap the outside with copper wire hook and electric current to the wires to create an electromagnet but then put a round bar of metal that spins inside the hollow circle and be able to slow the bar down by or exert a load on the bar by providing juice to the electromagnet around it?

[RafaelArantes-um]

is there any creation of an electric field? im doing a presentation on this topic and was told that there is a presence of electric fields.
i thought it was such that Faraday's law creates a electric field within the conductor, and these electric fields are spinning with the train's wheels which then make a magnetic field using Faraday's law again. is this correct?

[Momen]

Thank You so much 😊... I have a question that I hope you can answer, It is said that in electrical instruments the core of the coil is made from parallel wrought silicon iron sheets isolated from each other and parallel to the axis of the coil to increase resistance and decrease the effect of Eddy currents and reduce wasted electricity in the form of heat ..what i don't understand is : how can connecting sheets parrallel to coil axis increases resistance since it is supposed to decrease it and what does resistance have to do with Eddy currents 🤔....I don't know if you will answer but i had to try 😅
THANKS FOR YOUR TIME 😀

[sparkyinwa]

very nice, you might consider adding a video and include a copper piece with vertical slits showing a reduced effect and tie that in with transformer and motor construction being made with thin sheets of steel rather than solid machined blocks

[SandBox]

Sir, may I ask, what happens with Eddy currents in the case of a magnet moving really close to a superconductor?

[dizmat.mp]

Thank you habibi this will help me band 6 physics now

[timytli]

follow-up query. Can you explain what is occurring in the swinging copper sheet as it passes through the middle of the magnetic field (where the flux density is constant). There should still be force exerted on the positive charges in the copper sheet. does this add to 'magnetic braking'?

[mohandasrao]

Wow op explanation now it's too easy
Lenz law is too easy

[thelolman]

What software are you using for you demonstration in this video?