Equivalent resistance of tricky circuits?

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Homework Help Overview

The discussion revolves around finding the equivalent resistance between two points, A and B, in a complex circuit. Participants are exploring the application of Kirchhoff's laws in this context.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster attempts to calculate the equivalent resistance between points A and C and expresses uncertainty about how to approach the calculation between A and B, particularly since B is positioned in the middle of the circuit.
  • Some participants inquire about the methods used and request clarification on the work done so far.
  • Others suggest considering the circuit's symmetry and potential equivalences within the resistor network.

Discussion Status

The discussion is ongoing, with participants sharing their attempts and seeking further guidance. Some have provided insights into the circuit's structure, suggesting potential simplifications based on symmetry, but no consensus has been reached regarding the best approach to find the equivalent resistance between A and B.

Contextual Notes

There is a mention of an attachment that was not found, which may contain crucial information about the circuit layout. Participants are also navigating the challenge of calculating resistance in a non-standard configuration.

asifrulzz
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equivalent resistance of tricky circuits?

Homework Statement


what is the equivalent resistance between A and B?
img002.jpg



Homework Equations


kirchoffs law for voltage and current


The Attempt at a Solution


i got the equivalent resistance between A to C as 3R/4
but i have to find the resistance between A to B but point B is in the middle of the circuit and i don't know how to approach it
i am stuck on this
please help!
 
Last edited:
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asifrulzz said:

Homework Statement


what is the equivalent resistance between A and B?https://www.physicsforums.com/attachments/43813


Homework Equations


Kirchhoff's Law for voltage and current


The Attempt at a Solution


i got the equivalent resistance between A to C as 3R/4
but i have to find the resistance between A to B but point B is in the middle of the circuit and i don't know how to approach it
i am stuck on this
please help!
Hello asifrulzz. Welcome to PF !

No attachment found !
 


i have attached the circuit diagram
 


What approach have you tried? Can you show your work so far?
 


i have always calculated equivalent resistance at the ends
i don't have any idea how i would reach at point B which is in the middle
 


help please!
anybody
thanks in advance
 


The network of resistors is equivalent with a cube of resistors. You can use that the equivalent points are at equal potential if you connect a voltage source between points A and B, and can be connected with a wire.

ehild
 

Attachments

  • cubes.JPG
    cubes.JPG
    17.1 KB · Views: 2,088
Last edited:
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A step ahead: The points D,E,G of the cube are equivalent and can be connected with a wire. The same holds for J, H, C.

ehild
 

Attachments

  • cuberes.JPG
    cuberes.JPG
    11 KB · Views: 1,714

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