Very very very short question circuit analysis please?

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Homework Help Overview

The discussion revolves around a circuit analysis problem involving the calculation of potential difference between two points, A and B, in a circuit diagram. The original poster is uncertain about the relevance of specific voltage sources in the calculation and the nature of the connections represented in the diagram.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore whether the 15 Volt and 13 Volt sources affect the potential calculation, questioning the role of wires and resistances in the circuit. There is a focus on understanding the implications of open circuits and the nature of potential changes along the paths from A to B.

Discussion Status

The discussion is ongoing, with various interpretations of the circuit elements being explored. Some participants provide clarifications regarding the nature of the wires and potential differences, while others question the assumptions about the circuit configuration.

Contextual Notes

There is ambiguity regarding the configuration of the circuit elements, particularly whether certain points are open circuits and how that affects the potential calculations. Participants are navigating through these uncertainties without reaching a definitive conclusion.

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I am solving a VERY complicated exercise and I have this part that I don't understand.The image posted is a very big simplification of a part of the exercise.I have to find the potential between A and B.My question : Are the 15 Volt and the 13 Volt in the picture involved in the calculation?
I know I have to calculate the potential using Kirch.law btw.
 

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Elaia06 said:
I am solving a VERY complicated exercise and I have this part that I don't understand.The image posted is a very big simplification of a part of the exercise.I have to find the potential between A and B.My question : Are the 15 Volt and the 13 Volt in the picture involved in the calculation?
I know I have to calculate the potential using Kirch.law btw.

Do the lines represent wires only? If so, the 13V and 15V sources have no effect on the KVL sum from A to B.
 
The lines represent wires and they have resistances in it.
 
Elaia06 said:
Are the 15 Volt and the 13 Volt in the picture involved in the calculation?

Not if one end is open circuit. Are they really open circuit?
 
Elaia06 said:
The lines represent wires and they have resistances in it.

That's a confusing statement. Are the lines wires, with the resistances represented by the circled potential changes? Or are there hidden potential changes in the lines along the path from A to B?
 
Sorry.13 V is also resistance,15 V is only wire.
 
Elaia06 said:
Sorry.13 V is also resistance,15 V is only wire.

How can a wire be 15 V? Do you mean it is a wire that is at a 15 V potential, or leads to a 15 V source? Something like this:

attachment.php?attachmentid=57802&stc=1&d=1365775770.gif
 

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Wire that has a 15 V potential.The image is very right!
 
Elaia06 said:
Wire that has a 15 V potential.The image is very right!

Okay. Then consider that a single node can only be at a single potential; there is no potential difference between any points connected by a contiguous wire. In this case, the blue wires in the figure represent one node. The only potential changes that occur along the path from A to B are those due to the 12 V and 14 V drops.
 

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