How a Van de Graaff Generator Works
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- Опубликовано: 6 июн 2024
- Detailed explanation down to the electrons and protons on how a Van de Graaff generator works. Includes the triboelectric effect between the rollers and belt, corona discharge and photoelectric effect between the belt and brushes/combs, and Faraday ice pail effect at the top dome/bowl. Shows how arcing/sparks happen and how strong electric fields contribute to creating ions and plasma for making air gaps electrically conductive.
This video has correct English captions. Click on the CC button at the bottom of the video to see them.
See also, Triboelectric effect/series or triboelectricity:
• Triboelectric effect/s...
How to Make/Build a Van de Graaff Generator Part 1 (Homemade/DIY):
• How to Make/Build a Va...
Magnetic field using horseshoe magnet, keeper and iron filings:
• Magnetic Fields, Keepe...
I purchased the big and small Van de Graaff generators from Information Unlimited many years ago:
amazing1.com
The big one is made and also sold by Science First:
www.sciencefirst.com
I don't see it any more on their website but they have others. They also sell spare belts but don't say what they're made of.
To see how to make your own Van de Graaff generator:
rimstar.org/equip/build_make_v...
Follow me on Twitter:
#!/RimStarz
rimstar.org 
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Thanks! I'm glad you liked it. It was a lot of work so your feedback is appreciated.
-Steve
Excellent video! You are the only person on RUclips who actually explains this. Thanks a bunch!!
Absolutely agree with you. I have watched many videos about this topic, no one can explain how the positive charges accumulate on the outer surface of the belt, but he did.
I'm glad my presentation helps! Thanks for letting me know.
Finally, a person who explains this in detail! I don't get why other youtubers explain the Van de Graaff generator as a machine that simply collects electrons and they leave at that explanation, which is vague and does not really makes sense.
Das ist eine gute "How to"-Anleitung. Interessant war die Verwendung von Isolierband für den Antriebsriemen und wie man es auf die Rollen legt. Danke für die Zeit und Mühe, diese Videos zu machen. Es hilft vielen Menschen und inspiriert sie, etwas aufzubauen.
This is the best video I have seen for some one who wants to understand the Van De Graaff generator. Thanks Rimstar.
To understand Van de Graff Generator, I watched a lot of videos and this one was the most informative and useful one for me. Thank you for your effort! :)👏
You're welcome. And thanks for you generous feedback. I'm kind of fond of this one myself but it's reassuring to hear it from others.
Wow, this was so much more informative than I expected from a RUclips video. Excellent video!
Thanks. It's a lot of fun (but also a huge amount of work) making these detailed ones. Two others which I'm proud of are How a Crystal Radio Works ruclips.net/video/0-PParSmwtE/видео.html and How a Wimshurst Machine Works ruclips.net/video/nA4aCd5qFWs/видео.html
@@RimstarOrg you didnt leave a single little question. every small details was explained. nce work. thanks.
I gotta say you really did well on explaining this device, and even the effects that happen on the machine
Great Great Great. Thanks. First time in my life to understand clear easy I try many channels at you youtube but you are the best
This is just simply an excellent description. A comprehensive class unto itself. The best on the internet. Thanks for your efforts.
Just discovered you channel. I'm a fourth semester electric engineering student from Venezuela and this is just breathtaking for me. Thank you for the videos!
If you're not an educator by trade, you have certainly earned this educator's respect. Very well done.
Thanks. That's a big complement indeed. I spent 13 years traveling around the world teaching for a software company, I currently teach a few times a year for an adult education program, and have done other teaching and course development over the years. I can't seem to stop myself. :)
It's an insidious passion of mine, too, friend. Learn something new everyday, I say. It keeps Alzheimer's and boredom at bay.
Thanks! And thanks for the feedback. It's good to know the explanation works.
Best explanation and the questions give better insight, thanks
I have to agree with everyone - your explanation of how the charges move and where they're coming form and going to is perfect. This video needs to be made into a section in a physics or an electrical engineering text book, seriously. Thank you for laying it out. Your video is in my play list. I'm going to make a Van De Graaff generator too.
Best video to clarify all doubts about Faraday cage etc.
Going to have to watch this many times. Very detailed. Thanks!
its the best video on van de graaff generator..thanks for uploading it
Thanks so much! This has helped my physics revision improve SO WELL x
Thank you very much for all the information! Helped me understand how to build my future Van de Graaff generator! (Already ordered the parts)
even though I do not know English, the video is so didactic that I understood, thank you very much!!! from Brazil, translated by google translate hehehe
The triboelectric effect's video really helped.. Thanks a lot for helping and clearing my doubts :)
You explain it much better than Plasma Channel
Thank you for the video, it's the best explanation I found on Van Der Graaf generator, now I can build my own knowing how it works and why.
I searched hours for this explanation.. THANK YOU
I'm glad you liked it, thanks. And welcome to interacting on RUclips.
Comprehensive video! Thank you for making it
Wow! You're welcome! I'm delighted you liked it so much. And thanks for saying so.
Such a nice video to study for Physics Exam!! Thank you!
Great stuff, I always enjoy your videos.
Very informative. I wondered how they worked. I just wanted to see how the dome was constructed and attached to the circuit. Thanks.
Awesome awesome video, thank you so much! Answered a lot of my questions I couldn't gets my heads around!
your video is amazing it really helped to understand what a van de graaf genarator is
my bad at english and your good at presentation make my mind blow :)) ho ho ho thank you. Such a good guy. Spend a lot of his time to help people :D
AMAZING!!!!! BEST EXPLANATION I HAVE SEEN!!!! THANKS SO MUCH!!
It's my first time to log-in my account to RUclips. To like and comment to your video.
Very informative, thank you very much! :)
Thanks. I'm glad to hear it helped.
Excellent explanation
Wow this is an amazing video. I love learning things like this thank you so much for helping me understand better
By the way, which Myles? There seem to be two of them depending on if you include user in the URL.
Very clear, nice and informative. Helps allot!
You're welcome. Thanks for the feedback.
It's great explanation 👍
Thanks! During the last days I have been trying to make my own generator without success. Your video helps me a lot to see why my attempt didn't work. Now I *finally* understand why there is some charge accumulation at all (ie, which is the origin of the first charge gradient).
Glad to hear it helps! Know how it works makes all the difference between engineering and guesswork. Let us know how it goes.
that's amazing thank you so much for the video, it is a good explanation going into details. god bless you man
Thanks. I tried to make it as complete as I could for the popular types of Van de Graaffs at least.
You're welcome. I'm glad you like the videos. Thanks for watching them!
Wonderful explanation
So informative and visual. Thank you so much.
Wonderfull explanation... Thankz a lot..
Nice job , good explanation , a lot going on there
Great an complete explanation! Thanks a lot.
Excellent explanation, thank you.
You're welcome. I hope my answers helped. Cheers.
Superbly done.
Thank you for good clear information.
Great explanation 👍
Oh good, glad to hear it helped. Thanks.
Thanks a lot for the video and the detail
Thank you very much! Well explained
You gave a great explanation thanks for putting this up! Was horrified at some of the comments below the primary grades K-12 sure aren't what they used to be. Having fun printing conductive PLA and making little induction machines and also just finished a VDG using a printed sphere. Awesome retirement fun as I can now make conductors in most any shape within reason. Did a 200mm. sphere with the bottom curving gently up to the top end of the tube, looks a little like a torus from the bottom. Or a sphere that somebody sat on. Results v. good. Sounds like you're having fun with this me too it's interesting stuff.
That was so informative thanks for sharing.
Great video. keep up the good work.
Man's replaying to comments 10 years later
12 years later, too.
K, thx allot dude, this vid is great as well as the others on your channel. Keep up the good work :)
Very well done. Thank You
Thanks. The section explaining how the Faraday cage works is a little contentious since I wasn't using the standard approach to explaining it with just fields. But I really wanted to do it at the electron and proton level; more tangible, and also consistent with the rest of it. Have fun making your Van de Graaff generator. Be sure and check out my videos on that topic and ask questions if you run into problems.
the list of materials is nice, this way you don't need to find a very specific material.
Thank you ... The Video is much informative and helpful..
I'm glad to hear it. I try to leave nothing to the imagination so maybe that's why my explanation works for you. Thanks for the feedback.
Yes, you can use the same materials with a small homemade van de graaff. In fact the small one I show at 2:12 in this video has a Teflon roller at the bottom and a metal roller at the top and uses a rubber band for the belt. Using metal for the top roller is less effective than using something that's triboelectrically positive with respect to the belt material but the teflon and rubber band combination works so well that the results are still very good.
You're welcome. I'm glad I could help.
Great video!!
Thank you so much for this
amazing. your better than my physics teacher who went to oxford!!!
Thanks! That's high praise; that's a good school.
A very useful video
Awesome work! Now I understand it! Too bad this was not around when I was a college student.
hey bro u cleared tons of my doubts!!!!!!
I love this channel
Oh good. I wasn't sure I'd understood your question correctly. Thanks for letting me know.
Good explanation, What's voltage reach this toy?
Yes, by sharper surface I mean smaller in diameter.
Assuming 79kv between two domes, the smallest diameter dome has the stronger electric field around it. The air molecules will be repelled from the smaller diameter one, and be attracted to the larger diameter one.
And you're welcome. Glad I can help.
@aethersheep Great! I hope you aced it.
i am taking ona challenge of making a hand driven van de graff genrator...small and partable..from a plastic bottle ..do yo have any suggestion o what might be the gear ratio to make it work?
Very helpful!
K, thx, 1 more question. Why doesn't photoelectric effect happen in the first corona discharge at the bottom, but it happens on the top?
Great video.. Bro...
hey what did you use for your metal dome for your VdG? please reply, because i need an energy source for a project. HELP!!1
Thanks Sir, Its Very good.
Great video and channel. Subscribed. Found through a "like" from Myles.
How much energy can be retained and used else where? Would using a joule thief in line with diode and receiver for the discharges retain enough power to operate a refrigerator? At what scale would you recommend? Thank you for your time.
so the last part confused me - do you connect the upper brush to the inside or outside of the dome?
great job!
The upper brush is connected to the inside of the dome.
Is that what you thought, or did the video somehow lead you to think it was connected to the inside? If so, which part of the video made you think that?
Amazing¡, it's possible double the voltage?
The charge is deposited using the triboelectric effect. When two particular materials make contact and then break contact, their molecules interact such that charge is exchanged while they are touching but doesn't get restore when the separate. The belt and rollers are constantly making and breaking contact. And yes, we are transporting the protons and electrons exactly like transporting materials on a simple conveyor belt. See my video Triboelectric video, see link in this video's description.
thanx a lot Rimstar, but let me get this strait: so with just a bigger dome, the voltage on the dome increase? but charge isnt voltage, charge is number of electrons, voltage is pressure?