Can someone help me find the equivalent resistance

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Homework Help Overview

The discussion revolves around finding the equivalent resistance in a circuit with multiple resistors, specifically R1 through R7 with given values. Participants are attempting to analyze the circuit configuration and the relationships between the resistors.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants describe their attempts to calculate the equivalent resistance using series and parallel combinations of resistors. There are questions about the order of operations and the configuration of the resistors, particularly regarding which resistors are in series or parallel.

Discussion Status

Some participants are providing feedback on the calculations and suggesting re-evaluations of the resistor combinations. There is an ongoing exploration of the circuit relationships, with no clear consensus reached yet.

Contextual Notes

Participants are working under the constraints of a homework problem, which may limit the information available for analysis. There is an emphasis on visualizing the circuit and re-drawing it after each calculation step to clarify the relationships among the resistors.

Gonger
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For this question I am pretty sure I am doing everything right but I just can't get the right answer. Diagram below. This is the question. Find the equivalent resistance of the circuit shown in the diagram, where R1 = 3 Ω, R2 = 2 Ω, R3 = 4 Ω, R4 = 1 Ω, R5 = 1 Ω, R6 = 2 Ω, and R7 = 2 Ω.

What I did was R4 and R3 in parallel, R6 and R5 in series, R1 and R2 in series, R12 and R7 in parallel, then R65 and R43 in series together, and finally R6543 in series with R127. I keep getting 2.07 ohms as my answer. If you can make out what I said can anyone help me?
Thanks
 

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One problem I see with your calculations is you took R1 and R2 in series, but R2 is in series with R3//R4

R1 will be one of the last ones you can reduce
 
OK I still can't get it

I have R3/R4 in parallel. Then I took that in series with R2. Then I took that in series with R6//R5. Then all of that in series with R7. And finally that in parallel with R1. Does all that sound right?
 
Gonger said:
OK I still can't get it

I have R3/R4 in parallel. Then I took that in series with R2. Then I took that in series with R6//R5.

Are you sure about that?

Gonger said:
Then all of that in series with R7. And finally that in parallel with R1. Does all that sound right?

Are you sure about that?

Tip: Once you replace two resistors with an equivalent resistance, draw the circuit again with that replacement. That way, you will be able to see the relationships amongst the remaining resistors, instead of visualising it all in your head.
 

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