Equivalent electrical resistance

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Homework Help Overview

The discussion revolves around calculating the equivalent resistance in a direct current circuit, specifically focusing on the arrangement of resistors and their connections. Participants are exploring the concepts of series and parallel resistors within the context of circuit analysis.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are attempting to identify which resistors are in parallel and how to calculate the equivalent resistance for a specific highlighted section of the circuit. Questions about the arrangement and connections of the resistors are raised, along with considerations about the relevance of the diagram's layout.

Discussion Status

The discussion is active, with participants providing hints and guidance regarding the topology of the circuit. There is an ongoing exploration of how to simplify the highlighted section to facilitate the calculation of equivalent resistance.

Contextual Notes

Participants note the absence of specific circuit details and the original poster's difficulty in recalling their notes, which may affect their ability to analyze the circuit effectively.

TheDoctor46
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Hello guys!

It's been a while since I last had to deal with direct current and I'm having a hard time solving the equivalent resistance for a simple circuit.

I know this is rather simple, but I can't find my notes, so, could you please help me?

The photo of the circuit is attached.

Thanks a lot!
 

Attachments

  • Resistance.jpg
    Resistance.jpg
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Last edited:
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I am able to calculate the parallel resistors, but I can't remember how to proceed for the last group.

Thanks!
 
Which resistors did you find that are in parallel?
 
I highlighted the part that I am interested in finding.

Thanks!
 

Attachments

  • Resistance highlight.jpg
    Resistance highlight.jpg
    39.1 KB · Views: 404
Are there opportunities for parallelism there? How can you tell if resistors are in parallel?

Hint: The placement and angles at which components are drawn on a diagram are irrelevant; it's the topology that counts (what's connected to what). Connections can be bent, twisted, and moved anywhere along a given wire without changing the circuit.
 
Yes, I know that, but I am not able to calculate the equivalent resistance of the highlighted part. I know that the angles in the diagram don't matter, but I can't tell how the resistors are arranged.
 
Since only the topology matters, you can slide the junctions around on the wires as long as you don't slide past any components. Can you see how to do this in a way that reduces the number of junctions in the highlit part?
 

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