@@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.
@@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
@@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.
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.
I honestly think this is the best explanation of this phenomena on TH-cam. I would also have appreciated if you explained brush discharges a little bit
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.
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!
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?
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.
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.
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.
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.
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...
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.
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?
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.
@@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 :)
@@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.
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?
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.
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
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 !
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?
It almost makes you think of where a Venn diagram meets..Air is really thin up high does that mean it takes less gas to fly a plane!? Things are lighter !?
So that explains how the phone when it is charged more than 100% they will turn into heat. Because the corona is trap under the casing , and they cause the electron to collide with each other . There fore it create small friction inside since its trapped air molecules. Does that make sense? I opened up my phone before the metal part of the wire its so small that it releases not too much discharge. So its not gonna make your phone explode anytime sooner. But they are building it from contraction and expansion of the battery. Battery pack will become distort overtime.
Maybe. In general the voltages inside the phone are probably too low to make a corona at the wire surfaces. Then again the feature sizes are very small as you say. Still, I suspect most loss is in the chemistry of the battery.
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)
I have a home movie,several of them of balls white Tish in color and some pitchers that I catch at night or if I black out my house,who can identify what I'm seeing and the pop sounds that I hear
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
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.
That is due to the motion and complicated construction of the Wimshurst. As the big disk spins, it has alternating panels that are plastic and metal. When wires slide along the disk, they generate charge by rubbing the plastic (triboelectricity) then when they hit the metal it is transferred to the metal electrodes (balls). You are doing work when you spin the disk, so you are putting in energy to create the separation.
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?
@@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.
next is how to quantify (magnetohydrodynamic formulas) this phenomenon for a non-purposeful & purposeful application i.e arc blast explosion & arc furnace steel production , the energy balance equations to produce the effects thnks for the wonderful instructional video
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.
It is called a Wimshurst machine. Demonstration supply compainies like Pasco sell them but they are expensive. Several DIY channels describe how to make them. This is my favorite: th-cam.com/video/puC6-UaT9Fk/w-d-xo.html
Thank you so much sir , i have one question that Corona occur above 100kv, but you have been showing Corona discharge how amount of supply are you used for demo?? please explain me sir
The voltage is created by mechanically turning the wheel. It is not attached to any electrical power supply. Charging surfaces by rubbing can create electric potentials in the kilovolt range, but the amount of current is so small it isn't dangerous.
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 ؟
It was purchased before my time so I don't know. This one looks pretty close: www.shopanatomical.com/ProductDetails.asp?ProductCode=3B-U15310&Click=26683&gclid=Cj0KCQjw7Nj5BRCZARIsABwxDKKdg075S5HMThOTehljyuxLoFZpJRQxJh6YLrTLAGPXEncrOUyvZO8aAo66EALw_wcB There are cheaper ones out there.
@@Prof-Hafner Quite pricey, I think i'll learn and Diy one myself. Thanks for the reply though! I always thought van de graaf generators were the easiest way to make electro static force, had no idea these existed before this video haha
@@TCBYEAHCUZ Yes, most vendors of this type of equipment primarily sell to institutions. so they are not priced for individual purchase. DIY is the way to go! You will probably find more out there on VdG generators, and although they require a motor and seem more complicated, they may not be harder to make. You will learn a lot either way! :)
No, the gas pressure makes a difference. For the arc discharge you need high-pressure gas (atmospheric pressure) to create enough ions for the runaway arc to form. At lower pressure you might still get the corona discharge, but it would probably be dimmer and more spread out. In a "perfect vacuum" (which doesn't exist) you wouldn't get any of this! You will see other effects that require low-pressure gas, such as visualizing an electron beam, like this video: th-cam.com/video/orsMYomjwIw/w-d-xo.html
It is called a Wimshurst machine. You can buy one from physics lecture demo supply places like Pasco. There are also several videos on TH-cam on how to make one
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: th-cam.com/video/puC6-UaT9Fk/w-d-xo.html
The arc causes a large, local pressure change. As the air responds to equalize the pressure it launches pressure waves in the air (sound). At least that is what I have read about thunder, so I suspect it is the same for my little arc.
"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
Here's a practical demonstration of negative to positive electrode discharge: th-cam.com/video/XjP8F1iRmDc/w-d-xo.html Why do I do it? Because I can, and it amuses me!
God I missed people like you on TH-cam, continue you're the best I've seen
I agree
Agree too
I agree I like to know Corona discharge but I don't make a video about electric discharge
This man is coming back to a five year old comment section to teach us ❤️❤️
One of the best physics teacher I've seen so far...I really admired you Professor 😂
THIS HAS NOTHING TO DO WITH CORONAVIRUS TH-cam
SWVE Boyy okay thank you
@@SWVVETHROWBACKS What the fuck are you on? Stop spouting bullshit. You have no idea what you are talking about so stop pretending.
@@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.
@@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
@@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.
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.
WE NEED MORE PEOPLE LIKE YOU. I WISH YOU WERE MY PROFESSOR 😭😭😭
"students like to see the professor in pain" he knows everything 😭
This was the most fascinating thing the Internet showed me today. Thank you Sir
I honestly think this is the best explanation of this phenomena on TH-cam. I would also have appreciated if you explained brush discharges a little bit
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.
@@Prof-Hafner😮
😮
You are one of my favourite professor
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!
Respect for becoming a conductor for our amusement.
Corona discharge, is really interesting ,and the way you explained it,is more .☺
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?
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.
This man is God. What a way of teaching. Hat's off
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.
Yes, in an ideal situation. The localization is probably due to small asperities on the surface that you can't see.
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.
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.
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...
I was looking for this explanation on how tiny arcs of discharge occur. I subscribed thank you for a informative video.
So therefore corona can travel through air 😁😂
Yes! Oh NO!!! I guess this comment was kind of prescient!
@@Prof-Hafner According to WHO few days ago, yes it does. Corona travels over the air.
Your profile photo😱😱
🤣🤣🤣
I dont comment often but this is a very informative and funny content at the same time. Good job.
You are awesome professor. Wish I had teachers like you.
in the air we have the field that represents the charge
What a great and fun way of teaching
I was like i missed diamond in the search of gold on TH-cam.. ⚡
amazing professor ! Very helpful and i can understand the topic with ease
Amazing presentation! Bravo!
You can actually hear the corona discharge on the video. It gets loudest right before it sparks.
I really wasnt expecting the end, this is a magnificent video.
ı learned more from this video than my professor. thank you for your effort ı hope you keep going taking video.
What an epic presentation good job man!
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.
This was incredibly well-explained and helpful. Thank you!
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?
Keep the sparks flyin'!
Very helpful video! spot on about students wanting to see teacher in pain lol
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.
Hi,
What happens if you do this in a vacuum? If you are right, then nothing happens. Right?
Amazingly explained
Very good explanation with demonstration...
That was an amazing theoretical and practical explanation! Thanks a lot for your effort.. and that demo.. ouchh!
Thanks. Only the first spark hurts! :)
it is
This video was probably instrumental in helping Kakashi develop his Lightning Blade, so thanks. Konoha will always be in your debt.
@@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 :)
@@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.
I like Corona very Much
Not the virus....only the discharge😅
I'm more of a Tecate guy.
@@Prof-Hafner Lol.
@@Prof-Hafner i lean more towards fireball, but a budweiser will do
@@chicofromph33nix64 These drink choices are going downhill with each layer of the chat! :)
@@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..
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?
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.
@@Prof-Hafner thank you very much
Amazing video! Great explanation and very entertaining.
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
It is just meant to give the idea they move to the surface, not be a highly accurate diagram. You are correct though!
Would we feel/notice any differences in the air when the charge is high enough to cause Arc Discharge?
Discharges create ozone, so you might smell that. But otherwise there is no physical difference in the air that you would notice.
@@Prof-Hafner Thank you for the reply. I dislike the smell/taste of Ozone....my dentists use it.
simply great sir
Thank you so much sir
Very well explained
Amazing explanation professor! But why are you not damaged when you put your finger between the electrodes?
Since our bodies are highly conductive, the current largely goes along the skin rather than go "through" the finger.
That free hand circle was impressive itself lol
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 !
I don't know about any books on this in particular. There might be books on arc and glow discharge.
Best explaination and experience
Is that machine a miniature replica of the counter rotating pyramids used to charge the earth and cause a cataclysmic pole shift?
Yes!!
@@Prof-Hafner omg 🤯
I’d hate to know what would have happened if the plasma hit your metal ring! You’re brave :O
Why are we getting COVID-19 guidelines link under the title,TH-cam?
The confusion is generating views, so no complaints here. :)
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?
Loved your explanation sir👌👌
Very nice and understandable🙏
It almost makes you think of where a Venn diagram meets..Air is really thin up high does that mean it takes less gas to fly a plane!? Things are lighter !?
Not sure, but less air also means less lift, so (like everything) it is probably complicated.
So that explains how the phone when it is charged more than 100% they will turn into heat. Because the corona is trap under the casing , and they cause the electron to collide with each other . There fore it create small friction inside since its trapped air molecules. Does that make sense? I opened up my phone before the metal part of the wire its so small that it releases not too much discharge. So its not gonna make your phone explode anytime sooner. But they are building it from contraction and expansion of the battery. Battery pack will become distort overtime.
Maybe. In general the voltages inside the phone are probably too low to make a corona at the wire surfaces. Then again the feature sizes are very small as you say. Still, I suspect most loss is in the chemistry of the battery.
Waooo.... I wish I could discover you earlier!!
Thanks for this demonstration [yes, I'm almost a decade late, but heck, for me that's timely].
What is the name of the generator used ? I couldn't follow what @Physierge said.
Wimshurst Machine
@@Prof-Hafner thank you.
Wonderful!!
Thank you, sir.
I wonder what is difference 'partial discharge' of 'corona discharge'. Are they same?
Is there a video or anything to make the machine at home?
Yes if you search "Wimshurst" on youtube there are a few home-made ones there.
Great demo
Why are we adding only negative changes
what is the name of this generator
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)
It's not 4/20 yet.
Even if its not my language you explained it better to me than my script and my prof does
I have a home movie,several of them of balls white Tish in color and some pitchers that I catch at night or if I black out my house,who can identify what I'm seeing and the pop sounds that I hear
Wow!!! thank you, great theory and practice combination
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
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.
Great !! how can one ball get +, while the other get - ?
That is due to the motion and complicated construction of the Wimshurst. As the big disk spins, it has alternating panels that are plastic and metal. When wires slide along the disk, they generate charge by rubbing the plastic (triboelectricity) then when they hit the metal it is transferred to the metal electrodes (balls). You are doing work when you spin the disk, so you are putting in energy to create the separation.
Love from bharat thank you very much sir 🙏
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?
Soooo where is the part he talks about the Corona Virus? 😄
I keep expecting this video to blow up ha ha.
@@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.
Woooooow I'm impressed. Thank u ✨
Wow . I can't see such an nice explanation.. good !
next is how to quantify (magnetohydrodynamic formulas) this phenomenon for a non-purposeful & purposeful application i.e arc blast explosion & arc furnace steel production , the energy balance equations to produce the effects
thnks for the wonderful instructional video
I like this instructor
VERY EDUCATIVE THANK YOU
Thanks for the video! Can the corona discharge alone be enough to generate ozone, or do you need the arc discharge for that?
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.
where can i get one of these things i would love to make arcs
It is called a Wimshurst machine. Demonstration supply compainies like Pasco sell them but they are expensive. Several DIY channels describe how to make them. This is my favorite:
th-cam.com/video/puC6-UaT9Fk/w-d-xo.html
@@Prof-Hafner thank you!
Amazing
Very interesting.
Thank you so much sir , i have one question that Corona occur above 100kv, but you have been showing Corona discharge how amount of supply are you used for demo?? please explain me sir
The voltage is created by mechanically turning the wheel. It is not attached to any electrical power supply. Charging surfaces by rubbing can create electric potentials in the kilovolt range, but the amount of current is so small it isn't dangerous.
Extreamly helpfull , great job!!!
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 ؟
Where can we buy this exact model of wimhurst machine?
It was purchased before my time so I don't know. This one looks pretty close:
www.shopanatomical.com/ProductDetails.asp?ProductCode=3B-U15310&Click=26683&gclid=Cj0KCQjw7Nj5BRCZARIsABwxDKKdg075S5HMThOTehljyuxLoFZpJRQxJh6YLrTLAGPXEncrOUyvZO8aAo66EALw_wcB
There are cheaper ones out there.
@@Prof-Hafner Quite pricey, I think i'll learn and Diy one myself. Thanks for the reply though! I always thought van de graaf generators were the easiest way to make electro static force, had no idea these existed before this video haha
@@TCBYEAHCUZ Yes, most vendors of this type of equipment primarily sell to institutions. so they are not priced for individual purchase. DIY is the way to go! You will probably find more out there on VdG generators, and although they require a motor and seem more complicated, they may not be harder to make. You will learn a lot either way! :)
what does he call the generator? i cant hear it properly
Wimshurst Machine
@@Prof-Hafner thank you
Brilliant sir thank you very much
Is all of this the same in a vacuum?
No, the gas pressure makes a difference. For the arc discharge you need high-pressure gas (atmospheric pressure) to create enough ions for the runaway arc to form. At lower pressure you might still get the corona discharge, but it would probably be dimmer and more spread out. In a "perfect vacuum" (which doesn't exist) you wouldn't get any of this!
You will see other effects that require low-pressure gas, such as visualizing an electron beam, like this video:
th-cam.com/video/orsMYomjwIw/w-d-xo.html
where I can buy the Demo machine please?
It is called a Wimshurst machine. You can buy one from physics lecture demo supply places like Pasco. There are also several videos on TH-cam on how to make one
Can you give some information about how u made that instrument?
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: th-cam.com/video/puC6-UaT9Fk/w-d-xo.html
expliain briefly about and differentiate caronas at positive and negative conductors
Why is there a sound to this discharge?
The arc causes a large, local pressure change. As the air responds to equalize the pressure it launches pressure waves in the air (sound). At least that is what I have read about thunder, so I suspect it is the same for my little arc.
This was AWESOME
why no mention the noble gases at all?
I don't think the noble 1% needs any more help.
Physierge so you think all these magnetic gases contained (neon, argon, xenon and so on) have no effect on this?
"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
This is corona discharge not corona virus
Here's a practical demonstration of negative to positive electrode discharge:
th-cam.com/video/XjP8F1iRmDc/w-d-xo.html
Why do I do it? Because I can, and it amuses me!
Nice! I have stumbled onto your vdg's before. :)
I came here when Bob lazar use term 'Corona discharge' in his interview with Joe Rogan
Joe Rogan: decent comedian, excellent interviewer, horrible journalist.