Engineering A little circuit reduction question

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The discussion revolves around a circuit reduction problem involving capacitance between points B' and C' in two figures. The user questions the absence of a capacitance value in the reduced circuit, suggesting that a capacitance of 2C should be present. It is noted that the voltage sources appear to have been suppressed, indicating a potential application of Thevenin's theorem. The user realizes that both capacitors are effectively grounded, leading to their disappearance in the analysis. This insight highlights the importance of understanding circuit simplifications in electrical engineering.
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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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