Finding the Open Circuit Voltage

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SUMMARY

The discussion centers on calculating the open circuit voltage between points XY when KLM points remain connected, but the connection between XY is removed. Key equations referenced include V=IR and Kirchhoff's Voltage Law (KVL). Participants emphasize the importance of showing work to facilitate understanding and problem-solving. A critical error identified in the calculations was a factor of 1,000,000, highlighting the need for careful attention to detail in electrical calculations.

PREREQUISITES
  • Understanding of Ohm's Law (V=IR)
  • Familiarity with Kirchhoff's Voltage Law (KVL)
  • Basic knowledge of electrical circuits and potential difference
  • Ability to analyze circuit connections and current flow
NEXT STEPS
  • Review the principles of Kirchhoff's Voltage Law (KVL)
  • Practice calculating potential differences in various circuit configurations
  • Learn about open circuit voltage and its significance in electrical engineering
  • Explore common errors in circuit analysis and how to avoid them
USEFUL FOR

This discussion is beneficial for electrical engineering students, circuit designers, and anyone involved in analyzing electrical circuits and potential differences.

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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