Resistor Combination: Current and Potential Difference Calculation

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SUMMARY

The discussion centers on calculating the current at point X and the potential difference between points A and B in a circuit with three resistors (R1, R2, R3) in parallel, powered by a 2V battery. Participants confirm that the resistors are indeed in parallel, simplifying the calculations. However, a critical error is identified regarding the battery's polarity, which is incorrectly oriented. The solution involves computing the total resistance and applying Ohm's Law to find the desired values.

PREREQUISITES
  • Understanding of Ohm's Law
  • Knowledge of resistor combinations, specifically parallel circuits
  • Ability to calculate total resistance in parallel circuits
  • Familiarity with circuit analysis terminology
NEXT STEPS
  • Learn how to calculate total resistance for parallel circuits
  • Study the application of Ohm's Law in circuit analysis
  • Explore the effects of battery polarity on circuit behavior
  • Investigate common errors in circuit analysis and troubleshooting techniques
USEFUL FOR

Electronics students, hobbyists, and anyone involved in circuit design or analysis who seeks to understand resistor combinations and their implications in electrical circuits.

smaung
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Hello,

I have a tricky problem with resistors combination.

please check this url - http://www.disruptedstreets.com/physics.png

Can anybody help me with this?

Thanks

The Question is -

Calculate the Current at Point X and potential difference between points A and B.
 
Last edited by a moderator:
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looks to me like R1, R2, R3 are in parallel and the pot. difference between A and B is that provided by the battery.
 
yes me too

but some said ... there is a short circuit. but i don't know where is it ... :( and that's why I'm confused.
 
What does "X" represent?
 
"X" is the current at that point. We need to find the current ( I ) at "X". AND potential difference ( V ) between "A" and "B".
 
Oh sorry I Forgot. The battery is 2V.
 
I don't see any short-circuit. But in any case as jablonsky27 has noted, the three resistors are all in parallel. That should simplify the problem tremendously.
 
yea me too.. but.. there is another fault. the polarities of the battery is wrong .. positive is up and negative is down

can you please calculate the answers for me ?
 
smaung said:
yea me too.. but.. there is another fault. the polarities of the battery is wrong .. positive is up and negative is down

Turn the paper over.

can you please calculate the answers for me ?

No.

Compute the total resistance, apply Ohms law.
 
  • #10
ok thanks.
 

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