Physics 39 Capacitors (36 of 37) 2 Dielectric Layers

In this video I will find the capacitance of a capacitor with 2 dielectrics with various thicknesses.

Next video can be seen at:

[stephaniestampher]

There is a tiny violin in the lower right corner lol

[Tom_Ice]

You have literally taught me more about electromagnetics than my acutal electromagnetics lecturer

[raefon]

Im building a variable capacitor generator i have 2 dielectric materials plus an air gap. Is there any difference or just keep adding dielectric with one the k value 1.
The insulator distance being considerably less then the air gap.

[AntoAparicio]

Thank you very much for your work Michel, I wish I had a professor like you. It was clear, simple and short, as it should be.

[imonsanyal]

What happens if the dielectrics are arranged horizontally with respect to the capacitor plates?

[darthvaderisawesome]

Amazing explanation sir! Thank you very muchhh

[javierlopez]

What is the maximum voltage that can be applied if we know the dielectric strangth of both substrates?. It is useful to use two layers of a layer-1 of 10kV/mm dielectric strength and dielectric constant 10 with another of 1kv/mm and dielectric constant=100?
I should like to know if using 2 layers we could store more energy (energy=1/2*C*Vmax^2)

[nlo]

How do I resolve this to obtain a total value of K, for 2 different K values? I'm trying to work out the propagation velocity of a coaxial cable where the inner core is insulated with PVC, (K=3.2), and surrounded by air (K=1.0). From this I can design a 1/4 wave sleeve-Balun for suppressing dipole current imbalance.

[SaveTheFuture]

Doesn't the formula you came to suggest that with a capacitor with two dielectrics, having even a tiny layer of one of the dielectrics will massively increase the capacitance? Like if you take e and A as constants, as well as d2, k2 and k1, won't making d1 as tiny as possible make the capacitance as large as possible, even if the dielectric of the super thin layer has a huge dielectric constant?

[anuragmittal]

Please Clarify :
In parallel capacitor having two dielectrics with relaive permitivity X1 and X2 and distance "D" between plates . Now voltage "V" between the plates of both capacitors is same, but electric field in both dielectrics will be different due to different dielectrics ....than how come DE1 =DE2 = V ?? ( E1 AND E2 are feild in different dielectrics) what is wrong here???

[valeriereid]

Well explained thank you so very much for this example.

[sshannon]

My text says that the E field of a flat sheet of charge is sigma/(2epsilon naught) rather than sigma/(epsilon naught)....is that just a mistake in the video or am I missing something? I am thinking that this should be the E field of a parallel plate cap?

[solomongebreyesus]

Big respect for you professor.I understand vary well now.

[logio]

Great video, but there is, it think, easier way to do that, without knowing that V = Ed, these dielectric, you can say "form 2 capacitor in parraller", so their total capacitanc is 1/C = 1/C1 + 1/C2, you can plug in for C1 and C2 their respective capacitance and you will get the same answer .

[QScientist]

Thank you for your amazing explanation. But I've the question on physical process, not math inference: why do we have a right to devide one capacitor into two ones, serially connected? I see this in the picture, but WHICH RULES AND STRICT LAWS do we use when we say this? Why can't I say that capacitors aren't parallel connected or by other more tricky way? Does it use that lines of vector E are strictly horizontal?

[karameyer]

Very well explained. Thank you so much from South Africa !

[sudhanvab]

What if the area of dielectric is not same as capacitors area

[satishgana]

How to get the value of 'Q' for the materials?

[arunbrvce]

Very intuitive explanation. Easy to understand. Thank you so much. I had a question as well. If we insert a metal plate at the interface of K1 and K2, the expression will be exactly the same correct?

[zainerikat]

for me it was easy in high school but the professor i got now thinks we're gonna use it in daily life situations.
and great video and thanks for explaining everything i needed in the first two minutes.