Find Net Capictance: Capacitor C

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Homework Help Overview

The discussion revolves around finding the net capacitance between two points in a circuit involving multiple capacitors. The subject area is electrical circuits, specifically focusing on capacitors and their configurations.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the configuration of capacitors and question the nature of connections in the circuit. There are discussions about the impact of certain capacitors on the overall capacitance and how to approach calculating the net capacitance based on their arrangement.

Discussion Status

The discussion is active, with participants providing insights into the circuit's behavior and suggesting ways to simplify the problem. Some guidance has been offered regarding the arrangement of capacitors and their contributions to the net capacitance.

Contextual Notes

There is a mention of a visual aid (a circuit diagram) that lacks labels for the capacitors, which may affect clarity in the discussion. Participants are also considering the implications of certain capacitors being ineffective in the circuit.

Garvit
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each capacitor has capictance c

find net capictance b/w a and b

http://img17.imageshack.us/img17/5720/13481036.gif
 
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Is that intersection in the middle a contact? Or are those two wires not crossing?
 
yes there is connection between those 2 points
 
Alright, well after some time passes there will be no current. You will have a voltage drop from A to B, called V. If there is one capacitor between A and B, then you know the drop across the capacitor is just V. So that helps you solve for 2 capacitors.

The capacitor to the bottom left is useless since its voltage drop is just 0 (so its charge is 0).

That leaves the top 3 capacitors. The first two are connected in parallel from A to the midpoint. Then they are connected in series with the last capacitor to B. Once you get the net capacitance there...

You know those are now in parallel with the two capacitors we initially discussed. So you can just add their capacitances all up.

Sorry about all the text, would have helped if you labelled the capacitors in the pic.
 
thanks buddy , i got it.
 

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