Finding the Open Circuit Voltage

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Homework Help Overview

The problem involves calculating the potential difference between two points, XY, in a circuit where a connection has been removed while other points remain connected. The relevant equations mentioned include V=IR and Kirchhoff's Voltage Law (KVL).

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants express difficulty in solving the problem and are encouraged to share their attempts. Questions arise regarding the potential at specific points in the circuit and the implications of defined potentials.

Discussion Status

The discussion is ongoing, with participants sharing their attempts and seeking clarification on concepts. Some guidance has been offered regarding the potential at points Y and X, but there is no explicit consensus on the solution yet.

Contextual Notes

Participants have noted a misunderstanding of the problem setup and the calculations involved, including a significant error in one participant's calculations. There is an emphasis on the need for further information to accurately determine the potential difference.

JamesBennettBeta
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Homework Statement
While KLM points remain connected, the connection between points XY is removed. Calculate the potential difference between points XY in this situation.
Relevant Equations
V=IR, KVL
Problem Statement: While KLM points remain connected, the connection between points XY is removed. Calculate the potential difference between points XY in this situation.
Relevant Equations: V=IR, KVL

New Doc 2019-08-05 05.49.20_1.jpg
 
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And you will now show us your work...
 
berkeman said:
And you will now show us your work...
I couldn't solve it.
 
JamesBennettBeta said:
I couldn't solve it.
So show us what you tried. We can use that to help guide your approach better. We do not do your work for you here.
 
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New Doc 2019-08-05 20.18.47_1.jpg

Here is how I tried. I don't know how to solve further. I don't know how to calculate the potential difference between those points.

I'm sorry for not understanding how things work here.
New Doc 2019-08-05 20.18.47_1.jpg


I don't know how to find the potential difference between those points. So I can't slove further.

I'm sorry for not understanding how things work here.
 
Since you defined ABC as 0 potential, what is the potential at point Y? Recall that you said there is no current through R3.
Using similar reasoning can you find the potential at point X? What do you need to know to calculate the potential at point X?

Note: your current calculation is off by 1,000,000 times. Except for the sign error it's correct.
 

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