MIT Physics Demo -- Dissectible Capacitor

[PoirierMike]

Impressive coming from MIT ! ;)

[brahmabullsj]

The illusion from the demonstration, "energy" is stored within the glass. However, I don't believe the real answer is so simply. Space itself (e.g., pure vacuum) may also be used as dielectric. What is the behavior in this situation? 1) is the charge localized to the space, 2) charge is retained on metal. #1 would seem to be a strange behavior since implies absolute position. #2 is a departure from the original demonstrated behavior. I am interested to know if someone knows the answer.

[GreenLearning]

Wow! How to balance this with the MIT demo where the voltage goes WAY WAY up when capacitor plates are separated... This really intrigues me!

[mikepousti]

great invention.. Appreciate the thoughts.

[coldarc]

the glass holds an electric field. when the electric field is separated between plates of unequal influence one plate gain more negative charge than the other, the difference between them create voltage.

[rockerzac99]

i think you made a Magnetto

[HoneycombAgent]

Where does the electrical charge go?

[Lolpandax]

What would happen if you were to spin this at 88 miles per hour?

[wjbombo]

Wow, Cool demo! Thank you for sharing.

[junglelord]

In the books of Steinmetz he develops some rather unique equations for capacity. Tesla devoted an enormous portion of his efforts to dielectric phenomena and made numerous remarkable discoveries in this area. Much of this work is yet to be fully uncovered. It is my contention that the phenomena of dielectricity is wide open for profound discovery. It is ironic that we have abandoned the lines of force concept associated with a phenomena measure in the units called farads after Farady,

[junglelord]

Glass is a dielectric which can store electrical energy within its physical form. This should be common knowledge and not a surprise to anyone today…

"There is obviously no more sense in thinking of the capacity current as current which charges the conductor with a quantity of electricity, than there is of speaking of the inductance voltage as charging the conductor with a quantity of magnetism.

[junglelord]

There are some very serious misconceptions in the world of Electrical Engineering today. (The writings of Oliver Heaviside and Proteus Steinmetz gravely warned about this...) Let us start with the YouTube MIT Physics Demo video. This is a good demonstration for several reasons.

1.) Glass is a dielectric which can store electrical energy within its physical form. This should be common knowledge and not a surprise to anyone today…

[jbignes5]

It is not so hard to figure out what is going on. We all know the peizo effect? The glass is the capacitor in this case. The voltages are stored in the subatomic structure as vibrations. This is all done via the ability of the metal to interface with the glass on each side of the surface of the glass. Charge is held inside the glass in the many layers via the two plates on either side by the metal. Metal is a conduit not a storage mechanism.

[bodziobran]

@jbignes5

Fortunately it could be very easily proved. Just connect back dielectric to another metal plates from other Leyden jar and try to discharge.I'm very curious about results!

[batfan1939]

Why didn't the charge "pop" into your hand when you touched the Leyden Jar, like a carpet spark? The human body conducts electricity excellently (because it's mostly made of saltwater). Were you standing on an insulating pad?

[codygillespie]

This is an excelent demo on capacitance and dielectrics. The high voltage creates a more extreme condition that is easier to examine. The other video- Adjustable capacitor with dielectric- supports this as well. A quote from that video:

"This is one of the main reasons capacitors are built with dielectrics between their plates; more charge can be stored at a lower voltage."

Think about it and dont forget that air is a weak dielectric, glass and plastics are stronger dielectrics.

[Quinzio]

No, this is really misleading.

In a capacitor the charge is stored in the metal plates, not in the glass.

Between the plates there is a net difference of charges, that is a plates hold more electrons than the other one. If I make the two plates touch the difference of charge disappear.

The glass doesn' t hold or transfer any charge to the plates.

[wbeaty]

Misleading!

This shows odd misbehavior which only occurs at high voltage. For a demo with fewer misconceptions, go watch their other one:MIT PHYSICS DEMO ADJUSTABLE CAPACITOR WITH DIELECTRIC

[atelierrobin]

It cannot be misleading if it shows a real phenomena.

No misconceptions here. If we would would never investigate "Odd" behaviors, there would be no science and we would still be swapping pebbles in unheated caves.

[wbeaty]

> cannot be misleading if it shows a real phenomena

Sure it can, if the phenomenon doesn't happen with capacitors in general, but only if extreme high voltage is used.

Avoid corona effects by performing the demo at 1V rather than 50,000V.

Another possible fix: charge the plates while separated, *then* assemble the capacitor w/dielectric and continue as shown. That should get rid of corona which otherwise allows charge to leap through space and move to the dielectric surface.

[wbeaty]

> cannot be misleading if

Go watch their other demo: Adjustable capacitor with dielectric. That one shows how all capacitors operate, and isn't being used to fool the unwary.

[M104AMG]

My physics teacher back in 1985 had a similar dissectable capacitor and showed us the same thing.

Check out my videos on Eric Dollard.

[FlailingJunk]

My mind is blown.

[junglelord]

Thats because capacitance is not understood or taught properly.

Capacitance is due to electric tension and an inward pressure. It is always formed by a double layer (check out plasma physics and birkeland currents)

The Dielectric Field is the work of Tesla.

The reason why the charge is stored in the Dielectric, is because it is the Dielectric Field that has the Tension.

Watch Dollard on Youtube on Tesla.

Read Eric Dollard and Tom Bearden.

Maxwells formula, as taught is heaviside vectors

[frapente]

Amazing.

After years of theory and mathematical formulas,I never actually understood how a capacitor works and why it stores energy inside itself.Copper plates have'nt charge...charge is inside glass...is it true?

I'm astonished to see you can put togheter copper plates without discharge,and then if you reassemble the structure,energy discharge happens.

Energy seems vanish...where is it gone?

What really happens inside glass when gear works?

I don't understood very well.

[wbeaty]

> charge is inside glass ...is is true?

Nope. It only occurs in gas, and at extreme high voltages.

The charge starts out on the plates, as with any air capacitor or vacuum capacitor. But if the voltage is pumped high to create corona discharge, then the charges will leap across the gap from metal to glass.

Physically separating the plates also can cause the charge to leap to the glass surface. Separating the plates causes the voltage to skyrocket, creating corona discharge.

[insightllc]

@frapente TESLA MADE EARTHQUAKES IN 1899.

SEPTEMBER 3, 1899

SEPTEMBER 6, 1899

SEPTEMBER 9, 1899

"IF YOU ONLY KNEW THE MAGNIFICENCE OF THE THREE, THE SIX AND THE NINE... THEN YOU WOULD HAVE A KEY TO THE UNIVERSE."



-NIKOLA TESLA

(AFTER CAUSING 1899 CAPE YAKATAGA AND YAKUTAY BAY EARTHQUAKES FROM COLORADO SPRINGS)

111 YEAR OLD RIDDLE SOLVED BITCHES. THAT IS WHY YOU CAN'T DATE THAT QUOTE. THAT IS WHY HE ELUDES RECOGNITION. THAT IS THE SIMPLE TRUTH THEY DILUTE WITH CONSPIRACY.

-CMS 2010

[moglyS2pizza]

@frapente In the case of the Leyden Jar, it's true, charge is transferred to the surface of the dielectric cup by corona discharge when the jar is disassembled. However the capacitors generally not stored charge in the dielectric, but on the inside surfaces of the plates.

[rastarockerzz]

@frapente :)) lol go back to electrostatics dude . learn that a non conductive material can be charged with pozitive or negative charge by another object charged with one side(+ or -) , the capacitor is nothing else but that only the dielectric material(glass here) on one side is positive charged by pozitive armature(coper here) and on the other side is charged negative by the negative armature .

[SIMKINETICS]

@rastarockerzz When he picks up the pyrex beaker, why doesn't the charge conduct to his hand?

[rastarockerzz]

@SIMKINETICS

simply because the point where he is picking up the jar is neutral U(electric potential)=Vm-Vn=L/q. We are talking about an dielectric a non conductive material that will charge up only on the area where the charge Vm and Vn are inducted by copper. If you are looking carefully he is touching the area where the copper armature's weren't charge inductive so the Vm and Vn on that area = to almost 0 coulombs If U= Vm-Vn then U = almost 0 Volts.

[pashaahsj]

thats simply-sickky man !!

Awesome...

[feruwehr]

it actually stores energy like an usb flash lol xD

[ignilc]

amazing