Circuit diagram: find the equivalent resistance

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Discussion Overview

The discussion revolves around finding the equivalent resistance in a circuit diagram, focusing on the behavior of specific resistors and their configurations. Participants are engaged in a homework-related inquiry, exploring concepts of resistors in series and parallel.

Discussion Character

  • Homework-related, Technical explanation, Exploratory

Main Points Raised

  • Some participants express uncertainty about how certain resistors behave in the circuit, particularly those that are circled in their diagrams.
  • One participant suggests that two of the four resistors can be combined into one, reducing the circuit to three resistors.
  • Another participant asks for clarification on finding additional resistances that are in parallel.
  • There is a discussion about rearranging diagrams to clarify the next steps in solving the problem, with one participant noting that the two diagrams are equivalent.
  • One participant questions the presence of two different voltage sources connected in parallel, while another participant asserts that both sources are in series with current supplies.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the behavior of the resistors and the configuration of the voltage sources. Multiple competing views remain regarding the arrangement and analysis of the circuit.

Contextual Notes

Some participants have not shown their complete work, which may limit the understanding of the circuit's configuration. There are unresolved questions about the arrangement of voltage sources and their implications for the circuit analysis.

tensor0910
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Homework Statement



problem in title:

Homework Equations

1/Rtotal = 1/r1 + 1/r2...[/B]

The Attempt at a Solution


[/B]
I can get it down to 4 resistors...but the one's I have circled I don't know how they behave. I just need a little kick in the right direction lol. Thank you in advance!

upload_2018-2-21_13-50-25.png
 

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tensor0910 said:

Homework Statement



problem in title:

Homework Equations

1/Rtotal = 1/r1 + 1/r2...[/B]

The Attempt at a Solution


[/B]
I can get it down to 4 resistors...but the one's I have circled I don't know how they behave. I just need a little kick in the right direction lol. Thank you in advance!

View attachment 220816
Can you show your work? It looks like those resistors fold up pretty well...
 
tensor0910 said:
I can get it down to 4 resistors..
Please show your work.

If you are on the right track, two of the four resistances can be converted into one resistance and only 3 resistors remain in the circuit, two of which are your circled ones. You could then see how they behave.
 
here is my work so far. sorry for the delay
circuit.jpg
 

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Okay, so what's the next step? Can you find any more resistances that are in parallel?

upload_2018-2-24_21-59-40.png
 

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Likes   Reactions: tensor0910
Resistance in parallel means they have 2 common points.
 
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ok I got it now. Sorry guys not my strongest subject lol. Thanks for all the help!
 
Suppose your last diagram was rearranged into the diagram below. Then is it clear what the next step is? The two diagrams are equivalent.
Untitled 1.png


EDIT: I was too slow. My drawing skills are not worth s*&t.
 

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FactChecker said:
Suppose your last diagram was rearranged into the diagram below. Then is it clear what the next step is? The two diagrams are equivalent.
View attachment 221057

EDIT: I was too slow. My drawing skills are not worth s*&t.

see that makes sense to me. they're in parallel. But my book has this for example: ( Figure P2.8)
There's two different voltage sources but they're connected in parallel, right? How can that be?

upload_2018-2-25_20-59-51.png
 

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  • #10
tensor0910 said:
see that makes sense to me. they're in parallel. But my book has this for example: ( Figure P2.8)
There's two different voltage sources but they're connected in parallel, right? How can that be?
upload_2018-2-26_7-17-40.png

I don't see any voltage sources connected in parallel. Both of the the sources are in series with current supplies.
 

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