Resistors in parallel Thevenin circuit

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SUMMARY

The discussion centers on calculating the Thevenin equivalent resistance (Rth) in a circuit involving a 40 kilo ohm and a 160 kilo ohm resistor in parallel, followed by an 8 kilo ohm resistor in series. The participants clarify that the 40 kilo ohm and 160 kilo ohm resistors can indeed be treated as parallel components since they share the same voltage across them. Additionally, the method of calculating Rth can be verified using the open-circuit voltage and short-circuit current approach, ensuring accuracy in the results.

PREREQUISITES
  • Understanding of Thevenin's theorem
  • Knowledge of resistor combinations (series and parallel)
  • Familiarity with circuit analysis techniques
  • Basic concepts of voltage and current in electrical circuits
NEXT STEPS
  • Study Thevenin's theorem applications in circuit analysis
  • Learn about calculating equivalent resistance in complex circuits
  • Explore the open-circuit voltage and short-circuit current methods
  • Investigate practical applications of Thevenin equivalents in real-world circuits
USEFUL FOR

Electrical engineering students, circuit designers, and anyone involved in circuit analysis and design will benefit from this discussion.

influx
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When calculating Rth, they took the parallel combo of he 40 kilo ohm and 160 kilo ohm resistors, then they added the 8 kilo ohm resistor that's in series with the combo.

Maybe I'm having a brain freeze or something but how are the 40 kilo ohm and 160 kilo ohm resistors in parallel? They don't have the same voltage across them?
 
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When finding a Th equivalent circuit, voltage sources are treated as a short circuit when figuring Rth
 
influx said:
When calculating Rth, they took the parallel combo of he 40 kilo ohm and 160 kilo ohm resistors, then they added the 8 kilo ohm resistor that's in series with the combo.
The answer arrived at by this method should be the same as you'd calculate using the open-circuit voltage / short-circuit current approach. This means you can always check your own answer. :smile:
 

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