Help Needed: Solve Circuit Analysis Problem

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Homework Help Overview

The discussion revolves around a circuit analysis problem, specifically focusing on determining the voltage difference between two points in a circuit. The subject area is electrical engineering, with an emphasis on circuit laws such as Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL).

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to understand the voltage difference between two points in a circuit and expresses uncertainty about how to proceed. Some participants suggest indicating current flow and potential drops, while others question the assumptions about current flow in specific parts of the circuit.

Discussion Status

Participants are actively engaging with the problem, offering hints and questioning assumptions. Some guidance has been provided regarding the necessity of a complete circuit and the implications of ideal voltage sources. There is a mix of interpretations being explored, particularly concerning the role of certain components in the circuit.

Contextual Notes

The original poster has indicated a lack of clarity regarding the problem setup and has mentioned an attachment that presumably contains the circuit diagram. There is also a suggestion that the problem may be more complex than initially perceived.

Cetullah
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Hello dear Physics Forums community, I need your help! I m an electrical engineering student in second class, and I m stuck with a different kind of problem (probably different to me only, lawl) in the Circuit Analysis.

I believe this problem will be a stepping stone for the other problems I can't solve yet.

Homework Statement



In the attachment.

Homework Equations



Guess they are the Voltage law and Current Law.

The Attempt at a Solution



I m stuck, can't do a thing, will appreciate the attempts to guide me to solution.

Thank you!

Edit, Lol, the problem asks the voltage difference between point a,(the corner on left-top) and point b(the left-bottom corner of the loop in right)
 

Attachments

  • kirchoff.png
    kirchoff.png
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Indicate on your diagram where currents are flowing. Then determine the potential drops across all the components. Do a "KVL walk" from point a to point b.

Hint: A continuous current requires a complete circuit.
 
Hmm, so I guess there's no current flowing through the line in the middle?
 
Cetullah said:
Hmm, so I guess there's no current flowing through the line in the middle?

That happens to be a good guess.
 
Nice! And can I simply discard the 5v battery and the 10 ohm resistor when I m doing the KVL walk?
 
Cetullah said:
Nice! And can I simply discard the 5v battery and the 10 ohm resistor when I m doing the KVL walk?

Nope. The 5V voltage remains 5V no matter what; it's an ideal supply and cannot change. What's the potential drop across the resistor if the current is zero?
 

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