Finding the Open Circuit Voltage

In summary, the problem states that the connection between points KLM and XY has been removed, and the task is to calculate the potential difference between these two points. Relevant equations include V=IR and KVL. The conversation reveals that the individual has made attempts to solve the problem, but is uncertain about how to proceed and needs guidance. They are also informed that their current calculation is incorrect.
  • #1
JamesBennettBeta
10
1
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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  • #2
And you will now show us your work...
 
  • #3
berkeman said:
And you will now show us your work...
I couldn't solve it.
 
  • #4
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.
 
  • Like
Likes DaveE
  • #5
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.
 
  • #6
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.
 

FAQ: Finding the Open Circuit Voltage

1. What is open circuit voltage?

Open circuit voltage refers to the voltage measured across a circuit when there is no load or current flowing through it. It is also known as the potential difference between two points in a circuit that are not connected by any load.

2. How is open circuit voltage calculated?

Open circuit voltage can be calculated using Ohm's law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In an open circuit, the current is equal to 0, so the equation becomes V = 0 x R, resulting in an open circuit voltage of 0 volts.

3. What is the importance of finding the open circuit voltage?

Finding the open circuit voltage is important in determining the maximum potential output of a circuit. It can also help in identifying any issues or faults in the circuit, as a significantly lower or higher open circuit voltage than expected can indicate a problem.

4. How is open circuit voltage measured in a circuit?

Open circuit voltage can be measured using a voltmeter, which is a device that measures the potential difference between two points in a circuit. The voltmeter is connected in parallel to the open circuit and the voltage reading is taken.

5. What factors can affect the open circuit voltage?

The open circuit voltage can be affected by various factors such as the type of power source, the internal resistance of the power source, and the presence of any voltage drops in the circuit. Temperature and aging of components can also impact the open circuit voltage.

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