Need help solving resistor network problems

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Homework Help Overview

The discussion revolves around understanding and calculating effective resistance in complex resistor networks, particularly in series and parallel configurations. The original poster expresses difficulty in grasping the concepts and seeks guidance on resources and strategies to tackle these problems.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants discuss using series and parallel combinations to simplify circuits and suggest writing KCL equations for node voltages. There are inquiries about the nature of the problems, particularly regarding the lack of information on EMFs or potential differences. Some participants mention the potential use of symmetry in solving problems and express frustration with available resources.

Discussion Status

The conversation is ongoing, with various strategies being explored. Some participants have offered general tips on simplification and symmetry, while others are still questioning their understanding and seeking further clarification. There is no explicit consensus on a single approach, indicating a diverse range of thoughts and interpretations.

Contextual Notes

The original poster notes that the problems do not provide sufficient context or guidance, leading to confusion. There is mention of a desire for helpful websites and resources, as well as frustration with existing textbooks.

junior_J
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this isn't so much of a homework question . I am having trouble with identifying and calcultaing effective resistance for parallel or series connected resistors particularly ones that are very complex to even understand what's going on ... I did look through various websites and books looking for answers but ended up finding nothing ... my book listed 2 examples of the kind but these were poorly explained :(

this is not so much of a homework problem, but I've been having trouble solving these questions (2 days in a row )... are there any ways or say tips i could use to tackle these problems ? websites I've missed , books i might have to glance through ?? (but mainly helpful websites ...)

thanks in advance .
junior
 
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When you can, use series & parallel combinations of resistors to simplify the circuit. Once you're done with the simplifications, write the KCL (or KCL) equations for the nodes, and solve for the node voltages.
 
the problems I am dealing with right now don't even mention emfs or pds ... they say something to the effect " Find the effective resistance between x and y " ... and in between x and y lies a jungle of resistors . I can't even comprehend how theyre put together ...
 
Well, it's physical, so it's solvable. Can you post a copy of the drawing?
 
there are many of these problems ... I just want to learn how to do this ... errm if ud do it for me Ill get off the hook pretty easy

Can u just tell me how ud go about solving these ? may be tips/pointers or something like that

teach a man how to fish blah blah proverb comes to mind :)
 
... will i have to draw this one on mspaint ? really ... !
Im not jokin around ... i googled for these problems , nothin came up ...
 
Sometimes you can use a symmetry in the problem to help out. Like with R-2R ladders used in DAC circuits, for example. Either you can simplify with parallel-series combinations, or use a symmetry, or you just have to brute force it with KCL. If all the resistors have the same value or related values, that generally helps with the symmetry arguments.
 
My physics book doesn't even go as far as to properly describe how to do these ... Ill be damned if i ever open that book again !

anyways ur not getting through ... i have a thick skull !

thanks.
 

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