Electric Circuit Analysis: How to find the sign for power?

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SUMMARY

This discussion focuses on the assignment of signs for power in electric circuit analysis, specifically contrasting passive and active sign conventions. The user expresses frustration with their textbook's inadequate explanation of active sign convention and questions the reliance on memorization of signs based on current direction. The recommendation to read "Valkenburg" instead of "Boylestad" suggests that Valkenburg provides a clearer understanding of these concepts. The relationship between power, voltage, and current is emphasized, highlighting the need for a more intuitive approach to sign assignment.

PREREQUISITES
  • Understanding of basic electrical concepts, including voltage and current.
  • Familiarity with passive and active sign conventions in circuit analysis.
  • Knowledge of power calculations in electrical circuits.
  • Experience with circuit analysis textbooks, particularly "Boylestad" and "Valkenburg".
NEXT STEPS
  • Study the active sign convention in detail to understand its application in circuit analysis.
  • Read "Valkenburg" to gain insights into intuitive approaches for power sign assignment.
  • Explore practical examples of power calculations using both passive and active sign conventions.
  • Investigate additional resources or textbooks that clarify the relationship between voltage, current, and power.
USEFUL FOR

Electrical engineering students, educators, and professionals seeking a deeper understanding of power sign conventions in circuit analysis.

tahayassen
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My textbook does a very poor job of explaining how to assign signs to power: http://www.mediafire.com/view/?e0xr8j41tokujx6

It goes on to explain passive sign convention but it never explains active sign convention. Also, shouldn't the sign for power depend on voltage and current since power is just voltage times current? Why does it essentially tell me to memorize the signs depending on the direction of the current? Surely there is a more intuitive approach?
 
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Read Valkenburg instead of Boylested.
 
Kholdstare said:
Read Valkenburg instead of Boylested.

I have no idea to what you're referring to.
 

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