Solving Circuit for Open Terminal Voltage & Questions

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    Circuit Voltage
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Discussion Overview

The discussion revolves around solving a circuit to find the open terminal voltage, with a focus on the application of Thevenin's theorem and nodal analysis. Participants explore the implications of an open circuit and the behavior of components within it.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether there is current through the 2k-ohm resistor, suggesting that there should be none due to the open circuit.
  • Another participant asserts that the voltage drop across the 2k-ohm resistor will be zero, simplifying the analysis to a single loop.
  • A participant proposes a Thevenin equivalent with a voltage of 4 volts and a resistance of 6k ohms.
  • Another participant challenges the need for a Thevenin equivalent, suggesting that the voltage across the 12k-ohm resistor is sufficient to find the answer directly.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of using Thevenin's theorem versus directly analyzing the circuit. There is no consensus on the best approach to solve the problem.

Contextual Notes

The discussion reflects various assumptions about circuit behavior, particularly regarding the open terminal and the role of the 2k-ohm resistor. The implications of using Thevenin's theorem versus direct analysis remain unresolved.

Who May Find This Useful

Readers interested in circuit analysis, Thevenin's theorem, and nodal analysis may find this discussion relevant.

seto6
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hi i have this circuit to solve and i want to find the voltage at the open terminal.

i have few question regarding this, is there a current through the 2k resistor (i think there is none since there won't be any current through the open)

at the point of open voltage there use to be a load there i am trying to get a thevinin equivalent for it.

i tried nodal analysis but got stuck by the 2k ohm resistor i don't know how to get around that.

can you help me and tell me the way to solve this circuit and answer few of my question thank you so much.

[Image removed by Mentor, as the link now brings up a different image]
 
Last edited by a moderator:
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seto6 said:
hi i have this circuit to solve and i want to find the voltage at the open terminal.

i have few question regarding this, is there a current through the 2k resistor (i think there is none since there won't be any current through the open)

at the point of open voltage there use to be a load there i am trying to get a thevinin equivalent for it.

i tried nodal analysis but got stuck by the 2k ohm resistor i don't know how to get around that.

can you help me and tell me the way to solve this circuit and answer few of my question thank you so much.

[Image removed by Mentor, as the link now brings up a different image]
You're right. There won't be any current through the 2K-ohm resistor, so the voltage drop across it will be zero. You're just left with a single loop then, which is simple to analyze.
 
Last edited by a moderator:
so its valid for me to replace this circuit with:

thevinin voltage of : 4 volts

thevinin resistance of = 6k ohm
 
Yes.
 
why do you need thevinin anything? it's just a single loop. find the voltage across the 12k resistor and you have your answer
 

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