Solve Thevenin Problem: Find Rth & Vth for Points A+B

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Homework Help Overview

The discussion revolves around applying Thevenin's theorem to find the equivalent resistance (Rth) and voltage (Vth) for a circuit connected at points A and B. The original poster expresses uncertainty in applying Kirchhoff's loop rules to analyze the circuit effectively.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to identify loops in the circuit for analysis but struggles with current direction and the application of Kirchhoff's rules. Some participants suggest redrawing the circuit for clarity and question the validity of the identified loops.

Discussion Status

The discussion is ongoing, with participants providing suggestions for improving clarity in the circuit representation. There is no explicit consensus on the approach to take, and the original poster is seeking further guidance on how to proceed with the analysis.

Contextual Notes

The original poster mentions feeling overwhelmed by the complexity of the circuit, indicating potential constraints in understanding the current flow and circuit configuration.

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Homework Statement


Use thevenin techniques to find the equivalent circuit (Rth and Vth) to which the points A + B are attached.

Homework Equations



Kirchoffs loop rules
V=IR

The Attempt at a Solution


I have indicated my chosen loops in blue. I am not quit sure at this point how to apply kirchhoffs loop rule to each of the loops so that I can determine Vth. the only loop I felt confident on was number 1 i.e. 1: 5V-40ΩI1+Vth. There so much going on in the circuit that its hard from me to determine which way current is flowing so that I can create a junction rule for the wire between the yellow points. Any help would be greatly appreciated!
 

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So why not redraw the circuit so that it looks less confusing?

Also, your loops 1 and 2 are useless since they "loop" around open circuits, which are not really loops at all.
 
Last edited:
how do you purpose I re-draw it
 
It was a suggestion. Don't do it if you don't want.

You have not addressed my comment about your loops 1 and 2
 

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