Corona and Arc Discharge

A discussion and demonstration of corona and arc discharges. There is a special cameo at 7:58!
-----Charge! Playlist - • PHYS 102 | CHARGE!
-----Use the channel, or take the courses at edX - www.edx.org/course?search_que...
-----This material was produced by Rice Online - online.rice.edu

[@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.

[@itskha927]

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

[@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

[@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 😭

[@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.

[@observer4322]

Respect for becoming a conductor for our amusement.

[@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😱😱 🤣🤣🤣

[@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.

[@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]

😮

[@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!

[@zarintasnem8859]

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

[@wingeddragonofra]

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

[@Jerry-ug4mf]

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

[@JPSirPhysics]

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

[@anyagrosse3217]

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

[@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...

[@dylangoncalves9096]

Amazing video! Great explanation and very entertaining.

[@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.

[@prolawren6491]

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

[@asmakhan9195]

You are one of my favourite professor

[@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.

[@bojkogasper9145]

What an epic presentation good job man!

[@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..

[@aidinjavadi3622]

Amazing presentation! Bravo!

[@RalphDratman]

That is excellent. Thank you!

[@shubham9075]

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

[@joea3067]

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

[@kelvinndnm809]

Great video, thank you Sir!

[@omarobando8273]

Great video, great explanation.

[@coaderror3480]

Omar Obando hello

[@jalwaayan1182]

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

[@mariopuzo4509]

That free hand circle was impressive itself lol

[@ainawrites]

Amazingly explained

[@jyotisachdev1778]

Loved your explanation sir👌👌 Very nice and understandable🙏

[@douglasstrother6584]

Keep the sparks flyin'!

[@vivaanbhandari5042]

Great demo

[@glebor]

Extreamly helpfull , great job!!!

[@akhilchiluveru5834]

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

[@mehmetaltinoluk]

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

[@ankiwest]

Very good explanation with demonstration...

[@mikelotto7477]

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

[@LANKABHEDI]

Thank you so much sir!

[@melodyworld1486]

Brilliant sir thank you very much

[@beyond_borders_]

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

[@dpardo29]

This was AWESOME

[@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.

[@electrofun2490]

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

[@harshtiwari4767]

Best explaination and experience

[@yarrariver09]

thanks for your sharing.

[@rehanasharma7946]

simply great sir

[@saitan3428]

Thank you so much sir Very well explained

[@Speak4Yourself2]

Thanks a lot! An excellent class.

[@Prof-Hafner]

You are welcome!

[@moaaz2928]

a very nice helpful video, I've a question, since such a topic is not my major field but i need to generate a plasma by "Corona discharge concept " by using pulsed HV 22 Kv, and passing H2/N2 and I don't know how to start Any tips or advises ؟

[@user-cr6kv9xe3o]

Woooooow I'm impressed. Thank u ✨

[@sweet_starshine]

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

[@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.

[@TrinityParanormal-Quebec]

Thank you!

[@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.

[@ricardomartinezflores410]

what happen with the negative corona, when it expulse an electron, and flys until hit an atom? does the first electron take away another electron from an atom and itsefl goes away??? or the first electron take the place of the electron that expulse?

[@jofox8066]

So if you have near enough and charged enough electrodes in air you can get an arc discharge. But you can also get a coronal discharge in the air near the electrodes. I've seen a coronal discharge in a fairly strong vacuum. How does that happen if there's no air to ionise? Is it to do with the breakdown voltage changing with pressure?

[@shenaliranasinghe8764]

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

[@Prof-Hafner]

Only the first spark.

[@yohaijohn]

Really halpfull. Thank you

[@vamsikrishna5391]

Nice explanation sir

[@seshachary5580]

VERY EDUCATIVE THANK YOU

[@sdeelectamreli9562]

Thanks for the tutorial

[@nidaali7451]

Amazing

[@armsf4297]

I liked it sir really

[@ournation99]

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

[@mrv405]

awesome!

[@cyb.x]

Thanks a lot for this sir... 💯❤🔥

[@leonardogoncalvesjacometti4239]

Thank you!!

[@anelectricengineer26]

Nice explanation

[@amirarsalan9910]

It was very close 😆 thank you teacher.

[@RD-jp4zs]

Awesome

[@fernandog.1575]

This explanation 💯🤙🏻

[@davidg3944]

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

[@killuaz4863]

this looks so much fun to do XD

[@mohammadalramdhan6817]

I like this instructor

[@StrsAmbrg]

Very interesting.

[@5Dale65]

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

[@___Chris___]

I know this is an old video, but in case somebody is still reading this: Would it be possible to create faster ionic wind by repetitively disabling the collector electrode (=ion wind between a "sharp" emitter and a blunt collector) and instead "steal" the ions away by accelerating them into kind of a linear particle accelerator (= mixture of a miniature linear version of the CERN and a multistage plasma actuator, with high-voltage electrodes with fast-switching alternating polarities and gaps in between)? I wonder if this could be more energy efficient than a traditional multistage ion wind generator, because neutralizing ions only to create new ones in the emitter of the next stage seems like kind of a waste.

[@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.

[@humedomer6652]

We take this one during corona lock down online classes 😂😁 amazing 👌

[@Prof-Hafner]

Best of luck with your class and everything else!

[@swetadey7679]

Thank you...

[@vivekpandey5290]

Is there any difference between Corona and arc discharge?

[@kruimels]

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

[@moneerkutt1228]

nice, thank you so much

[@yasirsarfaraj3890]

i am watching ur video after watching @physicswallah video love from india

[@Prof-Hafner]

I enjoy Physicswallah and I don’t even understand what he is saying. :)

[@deepaknewaliya4016]

Love from bharat thank you very much sir 🙏

[@99parshvashah38]

helped me alot thankss

[@snehalranjan7424]

That demonstration at the end tho 🙌

[@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.

[@shreerambhat1442]

U deserve a way more subscribers

[@Prof-Hafner]

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

[@divyavaswani7930]

Can you give some information about how u made that instrument?

[@Prof-Hafner]

It's called a Wimshurst Machine, and we bought this one from a scientific supply company. There are lots of videos on how to make them at home. One of the best by RimstarOrg: kzbin.info/www/bejne/pqamZ2CLlrlsfM0

[@lukevibes4218]

Even if its not my language you explained it better to me than my script and my prof does

[@alokverma3311]

nice dear... enjoy

[@jeroenconinx6121]

This guy is ferocious with his chalk!!

[@baraskparas9559]

IMO the blue color is EM radiation which IMO is photons directly emanating from the fast moving electrons which are travelling in waves. Their blue light reflects off the plastic and metal. The arc discharge is white due to the frequencies coming off the other ions blending with each other.