A little circuit reduction question

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    Circuit Reduction
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Discussion Overview

The discussion revolves around a circuit reduction problem involving capacitors and voltage sources. Participants examine the implications of grounding certain points in the circuit and the resulting effects on capacitance values.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant questions the presence of an additional capacitance of 2C in the circuit after a reduction process.
  • Another participant suggests that the voltage sources have been suppressed, indicating a Thevenin equivalent, which leads to the grounding of points B' and C'.
  • This grounding results in the disappearance of the capacitance between B' and C' as both ends are grounded.
  • A later reply expresses appreciation for the clarification, indicating a moment of realization regarding the circuit's behavior.

Areas of Agreement / Disagreement

Participants appear to agree on the grounding effect of the voltage sources, but the initial question about the additional capacitance remains unresolved.

Contextual Notes

The discussion does not provide explicit definitions or assumptions regarding the circuit elements, and the implications of the Thevenin equivalent are not fully explored.

inquel112
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Homework Statement


The attached file has a circuit reduction which I can understand all but the missing capacitance C between B' and C' to the ground each from figure (a) in figure (b)


Homework Equations


N/A

The Attempt at a Solution


Shouldn't there be another capacitance of 2C in the bottom line of figure (b)?
 

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Looks like the voltage sources have been suppressed (Thevenin?). Thus B' and C' both are grounded through the shorted supplies. Both ends of those two caps are thus grounded... and they disappear in a puff of logic :smile:
 
oh wow. i feel a little embarrassed now but never thought i would make that out in my head. thanks so much!
 
No problem. Glad to help.
 

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