dielectric permittivity


by Mr.Bomzh
Tags: dielectric, permittivity
Mr.Bomzh
Mr.Bomzh is offline
#55
Jan5-14, 10:43 AM
P: 90
Oh god damn , I guess it has to do with the way I explain stuff.

Ok Ill try simpler, Change the dielectric constant of a dielectric between the plates of a capacitor and you get a change in capacitance when the cap is in a circuit or you get a change in voltage if the cap is charged and then disconnected from a circuit, because as we concluded and it also seems logic to me that upon changing capacitance if the charge has a path to go then it will if it doesn't then the PD across the plates will change because the charge has nowhere to go so something must give.

Ok I agree there is a oficially accepted way of things we know and then there are opinions but everyone as one , I mean we all see the world around us in some very personal way , even physics , one understand it by water analogies other people by different things etc.Maybe I'm just excusing myself anyway I;m sarting to get really dissappointed about this whole thing, not because of you , you've guys bee a great helf , I'm rather angry that the stupid physics :D doesnt work out the way it needs to.. :D:D
I still kinda get that the damn charge must flow if one does the things mentioned above from a capacitor if it is connected to a proper circuit, ground, +ve etc and it can't flow if the cap is alone , I hope that thing is clear.
sophiecentaur
sophiecentaur is offline
#56
Jan5-14, 10:51 AM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
"Personal Opinions" have a habit of causing circuits to burn out and bridges to collapse. If you want to deal with these sorts of problems from a personal and subjective point of view then you are unlikely to get far. You can see the world any way you want to but if you want to affect it and make it work as you want then you need to learn the way it works.
The few equations that apply to basic electrical circuits are all you need here. If you aren't prepared to use them and believe what they tell you then I can't see you making much progress, I'm afraid. You just have to talk the right language if you want to be understood. That's life, I'm afraid.
Mr.Bomzh
Mr.Bomzh is offline
#57
Jan5-14, 10:56 AM
P: 90
Yes true , even though many people see one thing and they go it and yet they each have a different take on it and how they get there.even though there are things which are true for everyone no matter their angle or opinion like mathematics.
well anyway was it at least right the thing I said it my last post?
sophiecentaur
sophiecentaur is offline
#58
Jan5-14, 10:59 AM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
I really can't tell.
Mr.Bomzh
Mr.Bomzh is offline
#59
Jan5-14, 12:25 PM
P: 90
Yes true , even though many people see one thing and they go it and yet they each have a different take on it and how they get there.even though there are things which are true for everyone no matter their angle or opinion like mathematics.
well anyway was it at least right the thing I said it my last post?
Hmm I don't know what to think, at the end of this thread I almoust felt I got it and you were suggesting that also , now 2+2 ain't 4 again.

I guess I'll stick to this what you said
The charge changes as the Capacitance changes.
sophiecentaur
sophiecentaur is offline
#60
Jan5-14, 12:42 PM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
Forget the words.
Q = CV is the equation. It says it all and you can't have "a different take on" Q=CV any more than you can have a different take on how much money you have in your pocket.
If you hold V constant then obviously Q is proportional to C. If charge cannot flow, then V is proportional to Q. If you . . . . . . and all the other possible combinations.
Isn't the whole point of using formula that it avoids endless chat, putting things one way and then another? If you have too much of a problem with interpret Q=CV then I suggest you drop the whole thing. You can't expect to make new inventions work without some calculations.
See - I'm getting grumpy now. Sorry.
Mr.Bomzh
Mr.Bomzh is offline
#61
Jan5-14, 01:16 PM
P: 90
ok I think I understand, thank you. from the bright side I hope I just made your tolerance level before you reach grumpiness a lot higher. :D
sophiecentaur
sophiecentaur is offline
#62
Jan5-14, 04:17 PM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
It's like water on stone - you get to me eventually.

wibble wibble wibble

Are you familiar with the 'beans' sequence in Blackadder?
Mr.Bomzh
Mr.Bomzh is offline
#63
Jan5-14, 04:28 PM
P: 90
I just looked up the show , sitcom apparently , well no I was not aware of this, but I greatly appreciate and personally like many of Rowan Atkinsons works, Mr. Bean would be probably the greatest , also some of his tv fun stuff before the Mr.Bean era.
I just put Blackadder on my downloads , will check it out, thanks.
So what the sequence is about ?

I hope it's not about those kinda unpleasant words written in the premise : http://en.wikipedia.org/wiki/Blackadder

:D
sophiecentaur
sophiecentaur is offline
#64
Jan5-14, 05:47 PM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
Ah. Different TV culture.
Lord Blackadder is trying to use a discussion about beans to teach his manservant Baldrick, arithmetic. Baldrick is only interested in beans as something to eat. You have been, similarly ignoring the Maths in favour of a chat and some arm waving. He is constantly criticising poor Baldrick in every episode. Baldrick always tries his best.
Mr.Bomzh
Mr.Bomzh is offline
#65
Jan6-14, 05:21 AM
P: 90
Oh I see, well I'm not good at maths so whenever one doesnt speak about QM or some other math heavy things , I try to talk in language which is called common english :D
I no doubt agree that math would be better but I think one can undersatnd caps without it too, their not that cpmplocated.I do realize that this statement probably made you loose some of your hair at the very instant you finished reading it. :D
i promise if i ever will get lucky in making some device , I'll denote money to your hair restoration. :)
sophiecentaur
sophiecentaur is offline
#66
Jan6-14, 05:33 AM
Sci Advisor
PF Gold
sophiecentaur's Avatar
P: 11,352
The fact is that Capacitors and the rest of electrical circuit work is complicated. The only language that describes most electrical phenomena well enough is Maths. In fact, the whole of Science uses Maths and has done since the time when Newton, Leibnitz and others started to get it systematised. Refusing to use Maths will pretty soon end up with that bridge collapsing or a fuse blowing. That's not to say you can't do construction projects and have success. But understanding what happened would be another thing altogether. 'Common English' doesn't put up satellites or make your computer work.


Your English is really fine, btw. I could not hope to discuss things to such a level in any other language as you are doing in English. I can socialise OK in French but it would be hard to get across any Science concepts.

I'm looking forward to receiving that cheque in the post. I will go straight down to the hairdresser's and sort out a wig for myself when it comes.


Register to reply

Related Discussions
Use of tensors for dielectric permittivity and magnetic permeability Classical Physics 1
Infinite dielectric permittivity Classical Physics 22
Complex Dielectric Permittivity!!! Engineering, Comp Sci, & Technology Homework 10
dielectric permittivity of 1 and polarization Advanced Physics Homework 0
different dielectric material with different relative permittivity Classical Physics 2