Circuits: reactive,active, and power factor

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Discussion Overview

The discussion revolves around calculating total impedance and power factor in electrical circuits, specifically focusing on reactive and active components. Participants are attempting to solve parts of a problem related to these concepts.

Discussion Character

  • Homework-related

Main Points Raised

  • One participant reports a total impedance of 14.23 ohms with an angle of 20.15 degrees and a power factor of 0.938.
  • Another participant questions the reported impedance value, suggesting that 14.24 ohms seems small, but later acknowledges the calculation is correct.
  • A participant notes that the supply voltage or current was not initially provided but clarifies that a 120V supply with an angle of 0 should be assumed.
  • Following the clarification of the supply voltage, another participant suggests that with the known voltage and impedance, the power delivered can be calculated.

Areas of Agreement / Disagreement

Participants generally agree on the calculated impedance and power factor, but there is some uncertainty regarding the assumptions about the supply voltage and its implications for further calculations.

Contextual Notes

There are limitations regarding the assumptions made about the supply voltage, which may affect the calculations of power delivered.

jhess1184
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I found total impedance to be 14.23 ohms with an angle of 20.15. Found power factor to be .938
Pretty much stuck at a dead end trying part 2 and 3.
 

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jhess1184 said:
I found total impedance to be 14.23 ohms with an angle of 20.15. Found power factor to be .938
Pretty much stuck at a dead end trying part 2 and 3.

[STRIKE]Can you detail your calculation of impedance and power factor? 14.24 Ohms seems a bit small to me.[/STRIKE]
EDIT: Never mind, my mistake: you have the impedance correct.

What's the magnitude of the voltage supply, E?
 
Supply voltage or current was not given. Just found out we were supposed to assume a 120v with angle 0 supply.
 
jhess1184 said:
Supply voltage or current was not given. Just found out we were supposed to assume a 120v with angle 0 supply.

Okay, so you known the voltage supplied and you know the impedance. You should be able to find the power delivered.
 

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