How Does Flipping a Capacitor Affect Charge and Capacitance in a Circuit?

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SUMMARY

The discussion centers on the effect of flipping a capacitor in a circuit configuration involving four capacitors, each with a capacitance of 0.8 F and a voltage of 16.6 V. The effective capacitance of the initial configuration is calculated to be 0.2 F, resulting in a charge of 3.32 C on each capacitor. The confusion arises from the flipped capacitor, which alters the charge distribution due to its opposite polarity. The final configuration's charge distribution is clarified by understanding that the flipped capacitor affects the overall charge balance in the circuit.

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  • Understanding of capacitor fundamentals, including capacitance and charge.
  • Familiarity with the formula CV=Q for calculating charge in capacitors.
  • Knowledge of circuit configurations and how capacitors interact in series and parallel.
  • Basic grasp of electrical polarity and its implications in circuit behavior.
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Homework Statement


So 4 capacitors are hooked up as shown in the picture on the left
http://i.imgur.com/RiNcYz4.png
each with C=0.8 F and the voltage from the battery V=16.6 V

Then they are disconnected and hooked up as shown on the left with one capacitor flipped. What is the effective capacitance on the configuration shown left, and the charge on the final system shown right?

Homework Equations



CV=Q

The Attempt at a Solution



I got the effective capacitance worked out to 0.2 F. I also know that the charge on each of the capacitors initally will be equal to the charge on the effective capacitor, which using CV=Q I got 3.32 C on each.

What's throwing me off is the flipped capacitor in the final configuration. It looks like they will each have the same voltage because in any given loop you cross two capacitors. And if they all have the same capacitance then shouldn't they all have the same charge? What exactly changes?
 
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DrIxn said:
I got the effective capacitance worked out to 0.2 F. I also know that the charge on each of the capacitors initally will be equal to the charge on the effective capacitor, which using CV=Q I got 3.32 C on each.

What's throwing me off is the flipped capacitor in the final configuration. It looks like they will each have the same voltage because in any given loop you cross two capacitors. And if they all have the same capacitance then shouldn't they all have the same charge? What exactly changes?

Think of it as each capacitor carrying the same charge and being added in one at a time. Three of them are connected with the same polarity, so the total charge adds up. The last one has the opposite polarity. What happens when its charges meet the existing charges?
 
Ah, thank you again :) I thought I had tried that answer already
 

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