Corona and Arc Discharge

[@Titane-AMS3311]

God I missed people like you on KZbin, continue you're the best I've seen

[@aloevera1269]

I agree

[@friedrichbahk5675]

Agree too

[@thereturnofthebruce971]

I agree I like to know Corona discharge but I don't make a video about electric discharge

[@itskha927]

This man is coming back to a five year old comment section to teach us ❤️❤️

[@KumaPaws376]

THIS HAS NOTHING TO DO WITH CORONAVIRUS KZbin

[@KumaPaws376]

SWVE Boyy okay thank you

[@dcaonoek]

@@SWVVETHROWBACKS What the fuck are you on? Stop spouting bullshit. You have no idea what you are talking about so stop pretending.

[@dcaonoek]

@@KumaPaws376 He's talking out his arse. 5G wireless frequencies are higher than 4G not more powerful. They are so far from being powerful enough to give off corona discharge. Old AM/FM radio transmitters of many thousands of watts could potentially create a corona discharge aroun the antenna, but it is not a desirable outcome so the antenna, filters and amplifiers were designed to stop that from happening.

[@LK-cq4qq]

@@SWVVETHROWBACKS na na na "coronam" Is latin for crown And like a crown this family of bacteria has ends*(or receptor i don't know exact word) that is similar to it . That's why it is named that way

[@LK-cq4qq]

@@SWVVETHROWBACKS Also I am from India and we don't have so much "5G" Still 20k above are infected for now( :( ) Also what about Japan🇯🇵 Singapore🇸🇬 South Korea they had done great job without lockdown due to fast and great measures early.

[@4thDimensions9902]

One of the best physics teacher I've seen so far...I really admired you Professor 😂

[@aloevera1269]

WE NEED MORE PEOPLE LIKE YOU. I WISH YOU WERE MY PROFESSOR 😭😭😭

[@Jokaanan]

"students like to see the professor in pain" he knows everything 😭

[@asmakhan9195]

You are one of my favourite professor

[@akundu2000]

This was the most fascinating thing the Internet showed me today. Thank you Sir

[@kalutpantai4192]

I honestly think this is the best explanation of this phenomena on KZbin. I would also have appreciated if you explained brush discharges a little bit

[@Prof-Hafner]

Thanks! Yes if you watch closely you can see some arcs around the brushes. I didn't get into exactly how the Wimshurst works, but the brushes a dragged over metal pads on the insulating plastic wheel. I suspect that if you run the wheel fast enough, the brushes charge up to an arcing potential in the time they spend moving between the metal pads. It probably also helps that the brushes are made of sharp wires, so it is easier for them to create an arc.

[@sebastianraimondo771]

​@@Prof-Hafner😮

[@sebastianraimondo771]

😮

[@mamtasingh-rr5zs]

Corona discharge, is really interesting ,and the way you explained it,is more .☺

[@vedantkakde3273]

So therefore corona can travel through air 😁😂

[@Prof-Hafner]

Yes! Oh NO!!! I guess this comment was kind of prescient!

[@StrsAmbrg]

@@Prof-Hafner According to WHO few days ago, yes it does. Corona travels over the air.

[@Anonymous_uncle]

Your profile photo😱😱 🤣🤣🤣

[@fearsomeaustin]

WOW what a fantastic professor! Keeps every minute interesting and keeps you focused with clean and clear drawings. Wish I had you as a prof during my college years or especially now in my electrical apprentice days. Great video!

[@observer4322]

Respect for becoming a conductor for our amusement.

[@sangeetabahuguna9141]

As I was wondering what would happen if he puts his hand between the two electrodes You demonstrated that too! Thank you very much for your effort! And also what is the the difference between arc discharge and capacitor?

[@Prof-Hafner]

The Wimshurst is essentially a capacitor that you charge up. The two round electrodes are like the plates, but the capacitance is not high since they are not flat and not close together.

[@JPSirPhysics]

This man is God. What a way of teaching. Hat's off

[@MrBoulayo]

The Corona Discharge (and the opposite due to positive charge) were first described by Giambattista Beccaria in 1753. He called them "stelletta" (starlet) and "fiocco" (ribbon) respectively.

[@wingeddragonofra]

I was looking for this explanation on how tiny arcs of discharge occur. I subscribed thank you for a informative video.

[@stadtjer689]

As a complete layman it is videos like these that really spark (pun semi intended) my interest when it comes to physics. It really takes talent to pull that off. Thanks for the great explanation and demonstration! Fun to watch.

[@zarintasnem8859]

Very helpful video! spot on about students wanting to see teacher in pain lol

[@aidinjavadi3622]

Amazing presentation! Bravo!

[@joea3067]

I dont comment often but this is a very informative and funny content at the same time. Good job.

[@rehanasharma7946]

simply great sir

[@pritharoychoudhury3492]

I was really stressed wid dis topic of corona discharge. Couldn't understand ANYTHING, even after reading for atleast 10 times ... But I just saw ur video ... Ur explanation was literally amazing sir ... Wish u were my professor...

[@prolawren6491]

amazing professor ! Very helpful and i can understand the topic with ease

[@bojkogasper9145]

What an epic presentation good job man!

[@mariopuzo4509]

That free hand circle was impressive itself lol

[@shubham9075]

You are awesome professor. Wish I had teachers like you.

[@anyagrosse3217]

This was incredibly well-explained and helpful. Thank you!

[@jalwaayan1182]

What a great and fun way of teaching I was like i missed diamond in the search of gold on KZbin.. ⚡

[@saitan3428]

Thank you so much sir Very well explained

[@damny0utoobe]

Thanks for this experiment. If you turn off the lights, the corona would be more visible before the arc discharge. But it's always difficult to capture on camera.

[@h7opolo]

4:12 the concentration of corona discharge is based on the proximity of the other electrode, not "accumulation." without presence of another object, the charge accumulation is equalized on the spherical surface.

[@Prof-Hafner]

Yes, in an ideal situation. The localization is probably due to small asperities on the surface that you can't see.

[@ainawrites]

Amazingly explained

[@Jerry-ug4mf]

I really wasnt expecting the end, this is a magnificent video.

[@douglasstrother6584]

Keep the sparks flyin'!

[@diptamahanta]

Waooo.... I wish I could discover you earlier!!

[@KakashiHatake-zv7me]

That was an amazing theoretical and practical explanation! Thanks a lot for your effort.. and that demo.. ouchh!

[@Prof-Hafner]

Thanks. Only the first spark hurts! :)

[@krishnanandach9329]

it is

[@dropthewalls]

This video was probably instrumental in helping Kakashi develop his Lightning Blade, so thanks. Konoha will always be in your debt.

[@iceezander]

@@Prof-Hafner Great video! Could you explain why this is? You mentioned the system being discharged after each spark, so wouldn't each spark feel like the first as the system is being 'reset' every time? Also, aren't arc discharges incredibly hot (or is this wrong)? How does the same arc that turns air into plasma not burn your finger? Incredibly interesting topic... will definitely check out some newer videos :)

[@Prof-Hafner]

@@iceezander Thanks icezander. The sparks are all the same as you say, but your finger is numb after the first one! haha. Not entirely numb, but noticeably so. Yes, it is very hot, but it has a very small heat capacity since it is a gas. To burn you, something needs to be hot (to transfer energy) but also have a lot of energy to transfer. It is like why you can take a piece of tinfoil directly out of your oven without getting burned.

[@vivaanbhandari5042]

Great demo

[@ahuman4]

I like Corona very Much Not the virus....only the discharge😅

[@Prof-Hafner]

I'm more of a Tecate guy.

[@jed-henrywitkowski6470]

@@Prof-Hafner Lol.

[@chicofromph33nix64]

@@Prof-Hafner i lean more towards fireball, but a budweiser will do

[@Prof-Hafner]

@@chicofromph33nix64 These drink choices are going downhill with each layer of the chat! :)

[@chicofromph33nix64]

@@Prof-Hafner you're right.. I'll level it out with a modelo instead... the fact that you're still replying on this old video is amazing..

[@ankiwest]

Very good explanation with demonstration...

[@dylangoncalves9096]

Amazing video! Great explanation and very entertaining.

[@BecomeIndiancentury]

Best explaination and experience

[@melodyworld1486]

Brilliant sir thank you very much

[@mikelotto7477]

Wow!!! thank you, great theory and practice combination

[@MasterIvo]

in the air we have the field that represents the charge

[@seshachary5580]

VERY EDUCATIVE THANK YOU

[@mehmetaltinoluk]

ı learned more from this video than my professor. thank you for your effort ı hope you keep going taking video.

[@glebor]

Extreamly helpfull , great job!!!

[@StrsAmbrg]

Very interesting.

[@nidaali7451]

Amazing

[@RalphDratman]

That is excellent. Thank you!

[@دعاءمحمد-ذ4و]

Woooooow I'm impressed. Thank u ✨

[@mohammadalramdhan6817]

I like this instructor

[@dpardo29]

This was AWESOME

[@yohaijohn]

Really halpfull. Thank you

[@kelvinndnm809]

Great video, thank you Sir!

[@Speak4Yourself2]

Thanks a lot! An excellent class.

[@Prof-Hafner]

You are welcome!

[@damianalbanis9403]

Does a corona discharge create a wind current?

[@Prof-Hafner]

DEMO: Electrostatic Windmill kzbin.info/www/bejne/eKvRq5d8l918gqs

[@anelectricengineer26]

Nice explanation

[@yarrariver09]

thanks for your sharing.

[@deepaknewaliya4016]

Love from bharat thank you very much sir 🙏

[@sweet_starshine]

I’d hate to know what would have happened if the plasma hit your metal ring! You’re brave :O

[@5Dale65]

You can actually hear the corona discharge on the video. It gets loudest right before it sparks.

[@megasparky2657]

Hello, I have a presentation to do on this subject, do you perhaps know, by any chance, books that are about this effect ? I must also add that your presentation was really clear, thank you for that !

[@Prof-Hafner]

I don't know about any books on this in particular. There might be books on arc and glow discharge.

[@armsf4297]

I liked it sir really

[@jmmp18]

Amazing explanation professor! But why are you not damaged when you put your finger between the electrodes?

[@Prof-Hafner]

Since our bodies are highly conductive, the current largely goes along the skin rather than go "through" the finger.

[@snehalranjan7424]

That demonstration at the end tho 🙌

[@beyond_borders_]

Wow . I can't see such an nice explanation.. good !

[@TechnoW1zard]

In DC electrostatics the corona is visible, yes. But for the high voltage power equipment in the grid, the charges oscillate at 60 Hz so the corona is in the UV spectrum. It takes very expensive cameras to shift that UV light into the visible light bandwidth. Do you know how to make such a camera, or do you have some ideas about it?

[@TrinityParanormal-Quebec]

Thank you!

[@ranjeetsohanpal752]

Why are we getting COVID-19 guidelines link under the title,KZbin?

[@Prof-Hafner]

The confusion is generating views, so no complaints here. :)

[@mysticmarble94]

Corona Discharge & Corona Virus ... The ultimate Warriror 💪💪💪

[@Prof-Hafner]

Actually, corona discharges are used to chemically modify surfaces and would certainly disinfect! So you could treat corona with corona.

[@mysticmarble94]

@@Prof-Hafner I actually have an Ozone generator at home to treat a particularly smelly room. Although I'm worried about the damage it might leave behind on plastics. I read comments that Ozone and Plastic interaction can cause material degradation. Maybe if you ever have time for it. A video on that topic would be well appreciated ✌

[@jyotisachdev1778]

Loved your explanation sir👌👌 Very nice and understandable🙏

[@swetadey7679]

Thank you...

[@mariyork]

Would we feel/notice any differences in the air when the charge is high enough to cause Arc Discharge?

[@Prof-Hafner]

Discharges create ozone, so you might smell that. But otherwise there is no physical difference in the air that you would notice.

[@mariyork]

@@Prof-Hafner Thank you for the reply. I dislike the smell/taste of Ozone....my dentists use it.

[@ournation99]

Wonderful!! Thank you, sir. I wonder what is difference 'partial discharge' of 'corona discharge'. Are they same?

[@leonardogoncalvesjacometti4239]

Thank you!!

[@fernandog.1575]

This explanation 💯🤙🏻

[@arielshikoba1857]

Soooo where is the part he talks about the Corona Virus? 😄

[@Prof-Hafner]

I keep expecting this video to blow up ha ha.

[@kaan1481]

@@Prof-Hafner I think it will blow up, I watched this video yesterday and today it has 3000-4000 more views. Thank you for the playlist arrangements, they are absolutely helpful during these days that we have to stay at home.

[@moneerkutt1228]

nice, thank you so much

[@davidg3944]

Thanks for this demonstration [yes, I'm almost a decade late, but heck, for me that's timely].

[@mrv405]

awesome!

[@electrofun2490]

awesome ........................ nice explanation

[@akshaysid]

Is there a video or anything to make the machine at home?

[@Prof-Hafner]

Yes if you search "Wimshurst" on youtube there are a few home-made ones there.

[@kruimels]

Hi, What happens if you do this in a vacuum? If you are right, then nothing happens. Right?

[@Altamira-Arazz]

what is the name of this generator

[@99parshvashah38]

helped me alot thankss

[@LANKABHEDI]

Thank you so much sir!

[@DutchCrunch333]

Is that machine a miniature replica of the counter rotating pyramids used to charge the earth and cause a cataclysmic pole shift?

[@Prof-Hafner]

Yes!!

[@DutchCrunch333]

@@Prof-Hafner omg 🤯

[@mohamadhamoudy8232]

Dear Professsor , please when you draw the charges on the metal sphere , why you not draw charges distributed completely on the whole outer surface of the metal cnducting sphere , why you draw them on the boundary , as far as we know chrages will distribute uniformally on the surface of the metal conducting sphere , regards

[@Prof-Hafner]

It is just meant to give the idea they move to the surface, not be a highly accurate diagram. You are correct though!

[@surajkaytchannel1267]

That's why I love physics

[@shenaliranasinghe8764]

That was a very good explanation I understood everything, thank you 😊and the sparks! did it hurt???

[@Prof-Hafner]

Only the first spark.

[@flaplaya]

I've studied UHV my entire life and just had an Epiphany so very well put together video. Oh and this definitely deserved a like but i couldn't. It was at 420 8)

[@Prof-Hafner]

It's not 4/20 yet.

[@abhinavsingh3091]

thanks

[@shreerambhat1442]

U deserve a way more subscribers

[@Prof-Hafner]

Thanks! Most of my channel is not for the "casual learner"... :)

[@tomasmosquera2483]

Thanks for the video! Can the corona discharge alone be enough to generate ozone, or do you need the arc discharge for that?

[@Prof-Hafner]

Good question! Both types of discharge will create ozone because both create ions with enough energy to break the O2 bond. I'm not sure which type of discharge makes more ozone or which is more efficient. I'd guess that corona is more useful for applications since it is more continuous.

[@winproduction7585]

Could you explain more about excitation and give off color again? I mean when the ion is in positive, how can it be excited? The excitation is when electron in the atom get to higher level?

[@Prof-Hafner]

I don’t know the details for this exact gas, but here are two general tunings that might help: You can have excited electron states and be ionized (or not). They are related but not exclusive. Also, light could come from neutral atoms that are excited when an ion hits them.

[@winproduction7585]

@@Prof-Hafner thank you very much

[@rohitkhan363]

How many of you came here... After watching the vedio of capacitor from Alakh pandey sir.. (physics wallah)

[@Prof-Hafner]

I like to watch physics wallah and I don't even know what he's saying! :)

[@ashutoshjha3910]

Yah me 👍🏼👍🏼👍🏼

[@ashutoshjha3910]

@@Prof-Hafner really 😍 our physics wallah had world wide popularity 😘🤭

[@killuaz4863]

this looks so much fun to do XD

[@akhilchiluveru5834]

a very special video.awesome workkkkkkkkkkkkkkkkkkkkkk!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

[@josefruzicka9637]

Hi, really cool stuff you got there :) but I don't understand one thing... at 2:28 you say that electron is ripped of the ball and hits the atom which will end up making an ion. But shouldn't there be just one negatively charged ion with one more electron on its orbits rather than one positively charged ion and one separate electron? one positively charged ion = atom missing one electron, right? So you have one electron from the ball and one electron from the atom in the end. Or is this wrong? What am I missing here? Thank you

[@Prof-Hafner]

Hey, in this case it is not just the separation of a neutral atom. When an excess electron leaves the metal conductor, it is accelerated by the electric field to a high kinetic energy. So when it hits gas atoms, it has enough energy to ionizes them and keep going. In fact, the electron freed by that ionization would also accelerate, thus the cascade effect.