Thevenin's and Norton's theorems

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SUMMARY

The discussion clarifies the application of Norton's theorem in circuit analysis. It emphasizes that to find the open-circuit voltage (Voc), one must use the short-circuit current (Isc) multiplied by the Norton resistance (Rsc), not the load resistance (R). The correct formula is Voc = Isc * Rsc, where Rsc represents the equivalent resistance in the circuit when the load is removed. This distinction is crucial for accurate circuit calculations.

PREREQUISITES
  • Understanding of Norton's theorem and its components
  • Familiarity with circuit analysis techniques
  • Knowledge of Ohm's Law
  • Basic concepts of equivalent resistance in electrical circuits
NEXT STEPS
  • Study Thevenin's theorem and its relationship with Norton's theorem
  • Learn how to calculate equivalent resistance in complex circuits
  • Explore practical applications of Norton's theorem in circuit design
  • Review examples of open-circuit and short-circuit analysis
USEFUL FOR

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

Lizwi
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Please help. In Norton's circuit we have Isc(current), Rsc(Norton's resistance) and R load which the load resistance. I thought to find the voltage Voc I need to find the equivalent resistance of the two resistors and use ohms law to find Voc =Isc*Req. Is that right?
 
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No. R is the load. So in open circuit the load will not be present. Voc will be just Isc*Rsc (where Rsc is Thevenin or Norton resistance).
 

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