What if capasitor plate in different size

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Discussion Overview

The discussion revolves around the effects of using capacitor plates of different sizes on capacitance, exploring theoretical calculations and experimental implications. Participants are questioning how variations in plate area impact capacitance, especially when the plates are not identical or parallel.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether a smaller plate can be used for calculating area when paired with a larger plate, suggesting that the area of the smaller plate would be the relevant factor.
  • Another participant asserts that if the plates are not parallel, the capacitance would be lower than if they were parallel, and emphasizes that the area used in calculations should be that of the smaller plate.
  • A participant inquires about the impact of using ceramics as a dielectric between plates of different sizes, questioning whether this affects electrical measurements.
  • There is a reference to the capacitance formula, indicating that both plates need to be sufficiently large to achieve a higher capacitance, but the relevance of plate size differences is debated.
  • One participant expresses a desire for empirical data or research regarding error rates when using plates of different sizes, specifically looking for errors around 10E-15.
  • Several participants express uncertainty about the clarity of the original question, indicating a lack of consensus on the specifics being asked.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the implications of using capacitor plates of different sizes. There are multiple competing views regarding the calculations and effects on capacitance, and the discussion remains unresolved.

Contextual Notes

There are limitations in the clarity of the original questions posed, and some assumptions about the experimental setup and dielectric properties remain unaddressed. The discussion includes references to theoretical calculations without definitive empirical validation.

mentatx
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hi..
cant set both site fit face face.. ( not meaning paralel)
if make one side I mean plate much bigger.. and athor plate respectivel small (whic calculated area..) ..
So what happens.. I think I could use small one while callculating Area.. ?
2. if I am not iright is there any mistake approxamation..error rate
3. and would it bigger then my fit error ..while trying to put equal plate face to face instead above..
thnx..
 
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mentatx said:
hi..
cant set both site fit face face.. ( not meaning paralel)
if make one side I mean plate much bigger.. and athor plate respectivel small (whic calculated area..) ..
So what happens.. I think I could use small one while callculating Area.. ?
2. if I am not iright is there any mistake approxamation..error rate
3. and would it bigger then my fit error ..while trying to put equal plate face to face instead above..
thnx..

I'm not sure what you are asking? Are you asking whether you can use plates that aren't parallel and so are at some angle to each other?

If you did this then you would end up with a lower capacitance than if they were parallel. If one plate was larger than the other, then the area wouldn't change, as the area refers to the area which is parallel to the other, so you would only have the area of the small plate available.
 
there is no problem being paralel.. as I mentioned above..
are you answering due to some teorotical calculation.. or experimantal value..
between plates I am usign ceramics.. so one side bigger ..other side smaller.. and doest affect any dielectric mesaurment .. electrical measurement??
am I right.. cp values are around 10E-12 ..
so am I doing it right? have no time to test it.. I am just looking.. that is tested..
anyway.. thnx a lot.. and waiting your reply..
 
C = \frac{\epsilon A}{d}
Where;
C is capacitance
\epsilon is the permittivity
A is the *parallel* area
d is the distance between the plates

So it doesn't matter how large the plate is, both plates need to be big if you want C to be big.

* The top is not working, it should be \epsilon * A
 
I am not having problem to make plates big.. I know what the formule is..
just asking plate size different ..
so pls read above more detailed ..
thnx..
 
two plae is not identical (they are paralell.. their areas are different.) .. and so what happens..?
 
For your sake mentatx I sure hope that English isn't your first language!
 
Last edited:
I'm not sure if I understand exactly what you’re asking?
 
madmike159 said:
I'm not sure if I understand exactly what you’re asking?

[URL]http://www.physics.sjsu.edu/becker/physics51/images/25_02ParallelPlateCap.JPG[/URL]

I think he wants to know how capacitance would be effected if, for example, the top plate had an area 2A.
 
Last edited by a moderator:
  • #10
yeap.. that is it..
and if it is.. what is the error rate...
and.. is there any searh about it.. any calculted data.. I am looking for erron about 10E-15
thnx..
 
  • #11
and .. I know what I am using... I mean language.. the reason is.. I want answer from cabaple person..
 
  • #12
no one... ??
 

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