How Do You Calculate Apparent and Reactive Power in AC Circuits?

  • Context: Engineering 
  • Thread starter Thread starter charger9198
  • Start date Start date
  • Tags Tags
    Ac Ac circuits Circuits
Click For Summary
SUMMARY

The discussion centers on calculating apparent power, reactive power, current magnitude, and impedance in AC circuits, specifically with a power factor of 0.72 lagging and a power dissipation of 375 W. The apparent power is calculated as 520.83 VA, while the reactive power is determined to be 361.44 VAR. The magnitude of the current flowing in the circuit is found to be 4.34 A, and the impedance Z is calculated to be 9.91 + 19.19j ohms after accounting for a 10-ohm resistance. The circuit is confirmed to be inductive due to the lagging power factor.

PREREQUISITES
  • Understanding of AC circuit theory
  • Familiarity with complex numbers and their arithmetic
  • Knowledge of power factor and its implications
  • Ability to perform calculations involving phasors and impedance
NEXT STEPS
  • Study "Complex Number Arithmetic" to enhance understanding of impedance calculations
  • Learn about "AC Circuit Analysis" focusing on phasors and power calculations
  • Explore "Power Factor Correction Techniques" to improve circuit efficiency
  • Investigate "Inductive vs. Capacitive Loads" to differentiate circuit behaviors
USEFUL FOR

Electrical engineers, students studying AC circuits, and professionals involved in power system analysis will benefit from this discussion.

  • #61
gneill said:
Yes, that will work.

Is it correct to assume that the current value is the same throughout the circuit ? or would you obtain different value i.e. across the resistor
 
Physics news on Phys.org
  • #62
woodyzzz said:
Is it correct to assume that the current value is the same throughout the circuit ? or would you obtain different value i.e. across the resistor
It is a series circuit, so there's no option: The current must be identical throughout.
 

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 16 ·
Replies
16
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 8 ·
Replies
8
Views
4K
Replies
1
Views
5K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K