How to find effective resistance in a circuit.

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SUMMARY

The discussion revolves around finding effective resistance in a circuit involving multiple resistors. The primary equation referenced is for parallel resistors: 1/R = 1/R1 + 1/R2. Participants emphasize the importance of visualizing the circuit clearly to identify connections and symmetry among resistors. A specific issue raised involves confusion over a 1 Ohm resistor yielding an unexpected 100 Ohm result, indicating a potential miscalculation or misunderstanding of the circuit layout.

PREREQUISITES
  • Understanding of Ohm's Law and basic circuit theory
  • Familiarity with parallel resistor calculations
  • Ability to interpret circuit diagrams
  • Knowledge of symmetry in electrical circuits
NEXT STEPS
  • Study the principles of series and parallel resistor combinations
  • Learn how to simplify complex resistor networks using circuit reduction techniques
  • Explore circuit simulation tools like LTspice for visualizing circuit behavior
  • Investigate common mistakes in circuit analysis and how to avoid them
USEFUL FOR

Students studying electrical engineering, hobbyists working on circuit design, and educators teaching circuit analysis concepts.

Aceix
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Question: Problem 1 of the attachment.
https://drive.google.com/file/d/0B72RSYQDrg1vcm84SmxFcjhyOFk/view?usp=docslist_api

Homework Equations


For parallel resistors: 1/R=1/R1 +1/R2

The Attempt at a Solution


I am sure the resistors are not in series but they also don't look convincing enough to be parallel. I am stuck.
 
Last edited:
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You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?
 
mfb said:
You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?
mfb said:
You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check
mfb said:
You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?

I've tried all that to no avail. Pls check the link.
 
Aceix said:
I've tried all that to no avail.
Show your work please.
 
Simplified: https://drive.google.com/file/d/0B72RSYQDrg1vUlVpMVpJRlNnenc/view?usp=docslist_api
 
That is not simplified, it is the same diagram as in the problem statement.

The 1 Ohm resistor got 100 Ohms for some reason?
 

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