Circuits analysis with independent current source

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Discussion Overview

The discussion revolves around a homework problem related to circuit analysis involving an independent current source. Participants are attempting to apply Kirchhoff's Current Law (KCL) and Kirchhoff's Voltage Law (KVL) to find specific circuit values, including voltages and currents in various elements of the circuit.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • The original poster (OP) attempts to apply KCL at a node labeled "A" to find the voltage and currents in the circuit, initially concluding that v1 equals 5 V.
  • Another participant points out that the equation A + (A-4)/3 = 8 does not hold true for A=5, suggesting a potential error in the OP's calculations.
  • The OP acknowledges the mistake and expresses a willingness to seek further help if additional problems arise.
  • A subsequent post requests solutions to other problems, indicating a desire for collaborative assistance.
  • Another participant offers to discuss further problems via private message.

Areas of Agreement / Disagreement

The discussion reflects a lack of consensus on the correctness of the OP's calculations, with at least one participant identifying an error. The OP's understanding of the problem remains uncertain, and the discussion does not reach a resolution on the correct values.

Contextual Notes

The OP's calculations may depend on assumptions about the circuit configuration and the application of KCL/KVL, which are not fully detailed in the posts. There are unresolved mathematical steps in the OP's reasoning.

Who May Find This Useful

Students studying circuit analysis, particularly those working with KCL and KVL in the context of independent current sources.

intelwanderer
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Homework Statement



https://www.edx.org/static/content-mit-6002x/images/circuits/H1P2.79e52b492b94.png

Homework Equations



It's been a while since I've done KCL/KVL, could be that I'm being just being stupid.

I'm trying to find v1, i4, and the power in all the circuit elements.

The Attempt at a Solution



I just used KCL at the top node and got 5 as the voltage. I called the top node "A". A + (A-4)/3 = 8.

From there, I got that v1 equals 5 V because there is no resistor there(which is wrong), and the values of i1-3(16/3, 5, 1/3). i4 I GUESS is 1/3, but I don't think that is right. Power of the 1 ohm resistor is 25, and 1/3 for the 3 ohm resistor.

So apparently, I've screwed up. Help?
 
Last edited by a moderator:
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Check your work on the KCL: A + (A-4)/3 = 8. A=5 doesn't satisfy the equation.
 
Ah, I see. God, that was stupid. If I have more problems(probable), I'll post them on this thread.
 
Hey man! How did you find other problems? Can you give me solutions? please)
 
PM me. What problems are you having?
 

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