Leiden (Leyden) Jar Capacitor 

Thanks, glad you enjoyed it!

You are welcome and thanks for your comment!

Thanks for the kind comments and you are welcome!

You are welcome and thank you.

You are welcome!

Thanks again!

You are most welcome!

Yes it would work with the same metal inside and out. I used the different metals so that the two conductors would be more visible.

The dielectric does do more than just hold the two plates apart. It becomes polarized and affects how much energy is stored in the capacitor for a given voltage applied. Here are some videos where I discuss the polarization that goes on in the dielectrics. This one is an example I work in class of a parallel plate capacitor with two different dielectrics in parallel. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-oa9q55PH0-s.html This one is an example I work in class of a parallel plate capacitor with two different dielectrics in series. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kk4Kod3xaVs.html

@@electricandmagneticfields2314 ** Thanks Michael. From your examples, you discuss the "charge density on the plate." This is exactly the concept that a dissectible capacitor refutes. If you take away the metal plates after charging the parallel plate capacitor, and then move the "charged dielectric" to a different set of metal plates, what happens? Would it discharge? Same with the Leiden Jar, if you had removable aluminum/copper and replaced it with different metal coatings (after the jar was charged), would it still discharge?

Possibly if the external conductor can effectively act as a ground. But be careful because you might end up being the ground and get a very dangerous shock.

It is like two capacitors in series. The connecting wire should not matter.

It would. I used the two different tapes so that the inner and outer conductions would be distinguishable in the video.

@@electricandmagneticfields2314 But it is rather misleading. I had the same confusion.

@@dmaster20ify I should have mentioned why I used the two different metals in the video and that it was in material to the operation of the capacitor.

Yes you could store energy in capacitors just as you do in batteries. www.futurebridge.com/industry/perspectives-mobility/supercapacitors-a-viable-alternative-to-lithium-ion-battery-technology/

My watch? It survived, but I probably should have taken it off!

What do you mean?

Yes

A very long time. It depends on the leakage current through the glass insulator. I am guessing for years. That is why capacitors in electronics like old CRT TVs and microwaves can be dangerous.

Impressive!

I have metal foil on the inside and outside of the jar where the charge is stored. I could have used water on the inside instead of the metal to act as one of the "plates." I don't see a need to have disconnected the Van de Graaff generator for what I was trying to demonstrate in the video..

@@electricandmagneticfields2314 But the Van de Graaff machine could be the source of the electricity. I can't reproduce this Leydon stuff. I tried you foil paper inside and outside the jar. Plastic jar that the peanut butter comes in. I bored a hole in said cover and put a wire through it and taped it to the foil inside the jar. I taped the foil paper in and out of the jar. Corked the jar. I then attached a 3.8 volt charger to the wire for couple seconds. I then connect a wire to the two terminals of the Leydon Jar; nothing. I then connect the jar to 110 volts, nothing. I then connect 110 volt plug to each terminal of the jar, still nothing. Is it because I am black why I can't reproduce these experiments.

@@dmaster20ify I rarely get my demo projects to work the first time. Every time I do one it is a learning experience. You might actually have a capacitor. With a 3.8 V on the capacitor, you would not get a spark until the separation between a wire touching the inside and a wire touching the outside was less than 0.0001 cm apart. The dielectric breakdown strength of air is 30,000 V/cm. Connecting to 110 AC is dangerous, but since it is AC your capacitor can be anywhere between 0 and 110 volts across it. A simple device I have used to charge a Leyden jar so as to get a spark is the electrophorus ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4k-z5O3Xk4A.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Sqhgrw3bDmU.html

@@electricandmagneticfields2314 All I can say I appreciate your replies and explanation. I don't know what is electrophorus; and honestly and am no closer to figuring this out. This seems as complicated as getting a seed to grow.

@@dmaster20ify I included a link to an electrophorus. It is a static charge generated. It is just a piece of plastic, something like silk to rub it to get charge on the plastic, and a plate of metal with an insulating handle. I have successfully charged capacitors to high voltage with this.