A kirchoff's law question with multiple batteries

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Homework Help Overview

The discussion revolves around a problem involving Kirchhoff's laws and multiple batteries in a circuit, specifically focusing on finding the voltage across a 5-ohm resistor.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the correct terminology for voltage, with suggestions to refer to voltage "across" elements rather than "at" them. There are also prompts for the original poster to provide their attempts and to consider writing a Kirchhoff's Current Law (KCL) equation.

Discussion Status

The conversation includes guidance on terminology and approaches to the problem, with some participants emphasizing the need for an attempt to facilitate further assistance. The original poster indicates they have resolved the issue independently.

Contextual Notes

The original poster expressed uncertainty regarding the presence of three batteries and mentioned being stuck on the problem for two weeks.

Chester8990
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Homework Statement


To find the voltage at the 5 ohms resistor.


Homework Equations


V=IR
Kirchoff's first and second law



The Attempt at a Solution


The attempt was simply too long
I ended up with a voltage of 6.5V on the 5 ohm resistor...
Please help me, I have been stuck in this same question for two weeks.
What I wasn't confident with was the three batteries too...
 

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Could I suggest that you do yourself a favour and resolve to never refer to a voltage "at" any element? By always referring to "a voltage across[/color]" an element, or to a "voltage between two points[/color]" you will be giving yourself a subtle reminder of how you must go about determining the parameter.

So, what approach will you use for determining the voltage across the resistor in question?
 
You'll have to show an attempt before we can know how to help. Them's the rules.

As a suggestion, write a KCL node equation for the node where all the resistors come together. Choose the bottom node as the ground reference.
 
never mind guys i solved it, thank you
 

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