EE intro question regarding Voltage and Amps

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Discussion Overview

The discussion revolves around a conceptual homework problem related to electrical engineering, specifically focusing on the application of Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL) in circuit analysis. Participants seek guidance on how to approach the problem rather than the solution itself.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant expresses uncertainty about how to start solving the problem and requests pointers for approaching it.
  • Another participant suggests writing KCL equations for specific nodes as a typical approach to this type of problem.
  • A different participant mentions that KVL might also be useful in this context.
  • One participant asserts that KVL can provide an immediate answer by analyzing a specific loop in the circuit.
  • Another participant shares a general strategy of identifying unknowns, finding nearby nodes, and applying KCL, while also noting that KVL could be a neater solution if KCL proves challenging.

Areas of Agreement / Disagreement

Participants generally agree on the utility of KCL and KVL for solving the problem, but there is no consensus on which method is superior or preferred, as different approaches are suggested.

Contextual Notes

The discussion does not clarify specific assumptions or definitions related to the circuit elements involved, nor does it resolve the mathematical steps necessary for applying KCL or KVL.

Who May Find This Useful

Students or individuals interested in electrical engineering concepts, particularly those learning about circuit analysis techniques.

Yittrium39
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Homework Statement


http://rsteiger.is-a-geek.com:81/homework%20question.jpg

The question for me is merely conceptual. I'm really good at math (not that a lot would be required here) but I don't even know where to start, hence the lack of an attempt. I'm not looking for the answer (I already know what it is) I'm just looking for a pointer on how the problem should be solved. Any advice is appreciated!
 
Last edited by a moderator:
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Yittrium39 said:

Homework Statement


http://rsteiger.is-a-geek.com:81/homework%20question.jpg

The question for me is merely conceptual. I'm really good at math (not that a lot would be required here) but I don't even know where to start, hence the lack of an attempt. I'm not looking for the answer (I already know what it is) I'm just looking for a pointer on how the problem should be solved. Any advice is appreciated!

Write the KCL equations for the middle node and the right side node. That's generally how you approach this type of problem.

Welcome to the PF, BTW.
 
Last edited by a moderator:
KVL might be useful here too.
 
KVL gives the answer immediately. Look at the Left hand side loop going through the 30V supply and including V_0

My general approach is to look for the unknown, find nodes nearby and apply KCL. If that seems too difficult then try KVL (which in this case is the neater solution).
 
Cool, thank you!
 

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