I can't determine the capacitive and inductive resistance of the circuit

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Discussion Overview

The discussion revolves around determining the capacitive and inductive resistance in a circuit using Kirchhoff's Current Law (KCL) and the implications of circuit behavior over time. Participants explore the theoretical aspects of circuit analysis, particularly focusing on the behavior of inductors and capacitors after a "sufficiently long time." The conversation includes both conceptual understanding and mathematical approaches.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant expresses uncertainty about their approach using KCL and Cramer's rule, questioning if they are on the right track.
  • Another participant emphasizes the importance of understanding the circuit's behavior when it "is working for a sufficiently long time," suggesting that this understanding is crucial to avoid confusion.
  • Some participants assert that after a "sufficiently long time," the inductor behaves like a wire and the current through the capacitor is zero, although this claim is noted as potentially misleading.
  • There are repeated calls for the original poster to grasp the reasoning behind the note regarding the circuit's long-term behavior before proceeding with problem-solving.
  • Participants mention the implications of constant current and voltage conditions, indicating that under constant current, voltage is zero, and under constant voltage, current is zero.

Areas of Agreement / Disagreement

Participants generally agree on the importance of understanding the circuit's long-term behavior, but there is disagreement regarding the interpretation of the note about the inductor and capacitor's behavior, with some suggesting it may be misleading.

Contextual Notes

The discussion highlights potential limitations in understanding the implications of circuit behavior over time and the need for clarity on the definitions and conditions under which the inductor and capacitor operate.

Michael_0039
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Homework Statement
Specify the currents and the voltage drop of the elements. The circuit is working for a sufficiently long time.
Relevant Equations
nil
Hi,

I'm trying to solve this but it becomes difficult. I'm using KCL and I repalce ZL = j0,1ω (Ω) , ZC=... etc.
Finding 3 equations with 3 unknown variables (plus the ω).
And now is the time for Cramer's rule.

I'm not sure if I should move on.

What do you say ? I'm on track ?

Thanks.
..
Καταγραφή.PNG
 
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What does the circuit look like when it "is working for a sufficiently long time ". Draw that to show us that you first understand the implications before you try to go further because if you don't have that right, you'll just get lost and if you do have it right you'll see that the circuit is fairly straightforward.
 
phinds said:
What does the circuit look like when it "is working for a sufficiently long time "...
I'm not sure for that, it is a note.
 
I think that the key is this note. After a "sufficiently long time" the inductor act like a wire and the current through the capacitor is zero. (Μisleading)
 
Michael_0039 said:
I think that the key is this note. After a "sufficiently long time" the inductor act like a wire and the current through the capacitor is zero. (Μisleading)
Exactly. So draw that circuit.
 
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And by the way, if you don't completely understand WHY the note says what it says, you should worry about that first. Understanding that is WAY more important that just being able to solve this particular problem.
 
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pics.PNG

piece of cake
 
phinds said:
And by the way, if you don't completely understand WHY the note says what it says, you should worry about that first. Understanding that is WAY more important that just being able to solve this particular problem.
So @Michael_0039 , did you take that hint? Why is that important? What are the equations for a L and for a C?
 
1.PNG

For constant I, V=0

2.PNG

For constant V, I=0
 
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