How Do You Use the Superposition Theorem in Circuit Analysis?

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Discussion Overview

The discussion revolves around the application of the superposition theorem in circuit analysis, particularly in circuits with multiple voltage sources. Participants seek clarification on how to apply this theorem and explore alternative methods for solving the circuit problem presented.

Discussion Character

  • Homework-related
  • Technical explanation

Main Points Raised

  • One participant asks whether the superposition theorem should be used in the attached circuit problem involving two voltage sources and expresses uncertainty about solving such circuits.
  • Another participant suggests using Kirchhoff's Current Law (KCL) instead of the superposition theorem, proposing to write a KCL equation for the node between two resistors.
  • A follow-up question asks which voltage should be used in the analysis, indicating a need for further clarification on the application of KCL.
  • Another participant reiterates the importance of writing KCL equations, explaining that the sum of currents out of a node must equal zero and provides guidance on labeling the node and formulating the equation.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the use of the superposition theorem, with some advocating for KCL as an alternative method. The discussion remains unresolved regarding the preferred approach to solving the circuit.

Contextual Notes

There are limitations in the discussion, including the lack of clarity on the specific circuit configuration and the assumptions made about the application of the superposition theorem versus KCL.

raoulduke1
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In the problem attached do you use superposition theorem.
if so how do you use it?
I don't know how to solve circuits with 2 voltages.
 

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raoulduke1 said:
In the problem attached do you use superposition theorem.
if so how do you use it?
I don't know how to solve circuits with 2 voltages.

Nah. Just write the KCL equation for the node between R1 and R2 and solve.
 
thanks for the reply. which voltage do I use?
 
raoulduke1 said:
thanks for the reply. which voltage do I use?

Have you learned how to write the KCL equations yet for a circuit?

You write the equation that shows that the sum of all curents out of a node is zero. So in your problem, label the node between R1 and R2 as "Vx", and write the equation that shows that the sum of the 3 currents *out* of that node add to zero. Then solve away!
 

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