Find Thevenin's Voltage (VTH) Across Resistor R3 - Thevenin Theorem

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Homework Help Overview

The discussion revolves around finding the Thevenin's Voltage (VTH) across resistor R3 in a circuit, utilizing the Thevenin theorem. Participants are exploring methods to calculate this voltage and discussing the implications of their approaches.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • The original poster seeks clarification on using the current divider rule for the solution. Some participants suggest removing R3 to analyze the circuit and find the voltage drop across the remaining resistors. There is also a question regarding the correctness of an initial attempt at calculating VTH.

Discussion Status

The discussion includes attempts to verify calculations and interpretations of the Thevenin voltage. While some participants express uncertainty about their answers, others confirm the correctness of a revised value, indicating a productive exchange of ideas.

Contextual Notes

Participants are navigating through different methods and assumptions related to the circuit configuration and the application of Thevenin's theorem. There is mention of specific resistor values and the need for clarity on the voltage calculations.

Loke
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Find the the equivalent Thevenin’s Voltage (VTH) across resistor R3 for the circuit.

-can anyone tell me what's your answer for the solution?
-if i want to use current divider rule...how am i going to solve it?

attempt solution:
Vth=VR3=R3/(R1+R3+R2)*V
= 8.33v
 

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To find Thevenin voltage across R3, remove R3 from the circuit. Find current flowing in the circuit and from this find voltage drop across all resistors. Now find voltage difference across the points where R3 was present. That will give you the Thevenin voltage across R3.
 
Is my attempt solution correct? oh i know ady...thanks karthick...^^ my answer is wrong.Should be V=11.78v
 
Last edited:
Yes your answer is right, it is 11.7V
 

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