- #1
dortec
- 13
- 0
How can I determine the voltage across a 6k ohm resistor using Ohm's Law?
- Thread starter dortec
- Start date
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Discussion Overview
The discussion revolves around determining the voltage across a 6k ohm resistor using Ohm's Law. Participants are seeking assistance with a specific problem related to circuit analysis, involving techniques such as Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL).
Discussion Character
- Homework-related
- Debate/contested
Main Points Raised
- One participant claims the voltage across the 6k ohm resistor should be 6 volts but is unable to arrive at this answer despite using KCL and KVL.
- Another participant emphasizes the importance of showing work for homework help, referencing a forum FAQ that discourages assistance without it.
- A participant expresses frustration after attempting various methods, including converting voltage sources to current sources and finding equivalent resistors, yet still not achieving the correct answer.
- One participant requests others to refrain from asking for their work, insisting they have already explained their efforts.
- A later reply describes a method involving a current generator and Ohm's Law, suggesting that they successfully calculated the voltage by equating two expressions containing the current.
Areas of Agreement / Disagreement
Participants do not reach a consensus on the correct approach to solve the problem. There are multiple competing views on how to proceed, and the discussion remains unresolved regarding the specific calculations needed.
Contextual Notes
Participants express uncertainty about their methods and results, with some indicating a lack of clarity in their equations and reasoning. There are references to specific circuit elements and configurations that may not be fully detailed in the discussion.
- #2
dortec
- 13
- 0
come on someone help:S
- #3
The Electrician
Gold Member
- 1,402
- 210
Did you read the first post in this forum (the FAQ)? It says:
"1) Did you show your work? Homework helpers will not assist with any questions until you've shown your own effort on the problem. Remember, we help with homework, we don't do your homework. We already passed those classes, it's your turn to do so. "
"1) Did you show your work? Homework helpers will not assist with any questions until you've shown your own effort on the problem. Remember, we help with homework, we don't do your homework. We already passed those classes, it's your turn to do so. "
- #4
dortec
- 13
- 0
man, I've been working all day long yesterday with the problem. I've already told you i used kvl and kcl on the nodes and nothing worked, i tried changing the voltage source into a current source and still it didnt work.. i tried finding equivalent resistors .. and still .. the same thing, I am never getting a right answer.. so can u please help?
- #5
Winzer
- 597
- 0
Just don't say say what you did.
SHOW us the equations so we know where you went wrong.
SHOW us the equations so we know where you went wrong.
- #6
dortec
- 13
- 0
nevermind.. thnks for the help ...
- #7
dortec
- 13
- 0
anyways if someone is willing to help just do please. and don't ask to add my work.. because I've already told u wat i did..
- #8
vk6kro
Science Advisor
- 4,079
- 41
See the diagram above.
I tried this and got the right answer.
Voltage V is the voltage across the current generator. I1 is the current going left from there towards the 8 Volt supply.
I put the voltage V equal to two things containing I1. Just Ohms Law.
These are then equal to each other so you can work out I1.
Once you know that you can work out the voltages.
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