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

  • Thread starter DrIxn
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In summary: I must have been mistaken. Basically, when the charges from the three capacitors meet, they cancel each other out. So the final voltage is the same as the initial voltage, but the charge on each capacitor is different.
  • #1
DrIxn
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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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  • #2
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?
 
  • #3
Ah, thank you again :) I thought I had tried that answer already
 

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

What are reconnecting capacitors?

Reconnecting capacitors are devices used in electrical circuits to store and release electrical energy. They consist of two conductive plates separated by an insulating material, and are capable of storing electric charge.

How do reconnecting capacitors work?

When a voltage is applied across the two plates of a capacitor, the plates become charged with opposite charges. This creates an electric field between the plates, which stores the energy. When the capacitor is connected to a circuit, the stored energy is released in the form of an electric current.

What are the benefits of using reconnecting capacitors?

Reconnecting capacitors have several benefits, including improving the power factor of electrical systems, reducing voltage drops, and stabilizing voltage levels. They can also help to reduce energy consumption and costs.

How are reconnecting capacitors different from regular capacitors?

Regular capacitors are designed to store and release energy continuously, while reconnecting capacitors are designed to switch between storing and releasing energy. This makes reconnecting capacitors more efficient and suitable for use in power systems.

What are some common applications of reconnecting capacitors?

Reconnecting capacitors are commonly used in power systems to improve the efficiency and stability of the system. They are also used in electric motors, power factor correction systems, and electronic devices such as televisions and computers.

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