Capacitance, Potential difference

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Homework Help Overview

The discussion revolves around calculating the potential difference Va-Vb between two points in a circuit involving capacitors. Participants are exploring the behavior of charged plates in capacitors and the implications of initial conditions on the circuit's charge distribution.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the charge distribution on capacitor plates and express uncertainty about how to proceed with the calculations. Some question the assumption that all right plates of the capacitors can be negative if the capacitors are initially uncharged. Others suggest using Kirchhoff's Voltage Law (KVL) to analyze the circuit.

Discussion Status

The discussion is ongoing, with participants raising questions about the initial conditions and the implications for charge distribution. Some guidance on using KVL has been mentioned, but no consensus or clear resolution has been reached.

Contextual Notes

Participants are considering the initial state of the capacitors and how it affects the overall charge in the circuit. There is an emphasis on understanding the implications of these assumptions on the potential difference calculation.

lavankohsa
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Homework Statement


Find the potential difference Va-Vb between points a and b.

capacitance.jpg


Homework Equations

The Attempt at a Solution



Each capacitors left plate will have difference amount of positive charge and right plate will have negative charge. After that i don't know how to proceed.
 
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lavankohsa said:

Homework Statement


Find the potential difference Va-Vb between points a and b.

capacitance.jpg


Homework Equations

The Attempt at a Solution



Each capacitors left plate will have difference amount of positive charge and right plate will have negative charge. After that i don't know how to proceed.
If the capacitors are uncharged prior to being placed in the circuit, then the net charge in the part of the circuit right of the capacitors is zero initially.

I don't see how all of the right plates for all of the capacitors can be negative.
 
Last edited:
lavankohsa said:

Homework Statement


Find the potential difference Va-Vb between points a and b.

capacitance.jpg


Homework Equations

The Attempt at a Solution



Each capacitors left plate will have difference amount of positive charge and right plate will have negative charge. After that i don't know how to proceed.
If you are familiar with KVL, you can use it for the 3 loops to get the voltage across each capacitor.. Just find the potential of point b, assuming a as ground(0V).
 
Use KVL
 

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