# Is this circuit the same as this?

• pwi_rk14
In summary, the conversation discusses a circuit with three identical light bulbs and a fully charged capacitor. The power supply provides a steady potential difference. The question is which light bulb(s) is the brightest and whether the rewritten diagrams are equivalent to the original. The conversation also delves into the voltage drop across the components and the direction of current flow. They also consider the possibility of ignoring the capacitor and the resulting series connection between A+B and C.
pwi_rk14
The circuit includes three identical light bulbs and a capactior that is fully charged. The power supply provides a steady potential difference. Which light bulb(s) is brightest? I attached the diagrams.

My answer is C. Either that or A and B.
Are my rewritten drawings equivalent to the original?

#### Attachments

• original.jpg
5.1 KB · Views: 355
• rewritten.jpg
6.9 KB · Views: 374
Consider: What's the voltage drop across Resistor A, B, C and the capacitor in the origional. Then compare that to the other 2. Remember wire has a 'negligible' resistance, so across bare wire the potential has to be the same. I'm not answering your homework for you, though.

in the original diagram, after current flows through A and through B, it has to go through the horizontal bar in the middle. What happens there, do they cancel?

Does current flow through the middle? Current flows from higher potential to lower potential, right? Kind of like a ball at the top of a "potential hill". Label the left junction point 1 and label the right junction point 2 and figure out what the potential is at the points. Then post the current between the to points.
*Edit: The junctions after A and B respectively

Last edited:
Can I pretend the capacitor isn't there since it's fully charged?
And if I do, would A+B be in series with C?

pwi_rk14 said:
Can I pretend the capacitor isn't there since it's fully charged?
And if I do, would A+B be in series with C?

Yes, and yes.

## What is a circuit?

A circuit is a closed loop through which an electric current can flow. It is made up of components such as resistors, capacitors, and transistors, connected by wires and conductors.

## How do you determine if two circuits are the same?

Two circuits are considered the same if they have the same components, connected in the same way, and produce the same output when given the same input.

## What is the purpose of comparing two circuits?

Comparing two circuits can help determine if they have the same functionality and can help identify any differences or errors. It can also provide insights into the design and functionality of the circuits.

## Are there any tools or methods to compare circuits?

Yes, there are various software tools and techniques used to compare circuits, such as circuit simulators, circuit analysis software, and visual inspection.

## Can circuit comparison be used for troubleshooting?

Yes, circuit comparison can be a useful tool for troubleshooting as it can help identify any discrepancies or errors between the circuits, which can then be corrected to improve their functionality.

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