AC Power Calculations: Understanding Real & Reactive Powers

AI Thread Summary
Understanding AC circuits involves distinguishing between real and reactive power, where real power is the actual energy consumed, while reactive power represents energy stored and released by inductors and capacitors. In the given parallel circuit example, the real power can be calculated using the formula P = VIcos(φ), where φ is the phase angle, and reactive power is found using Q = VIsin(φ). The components include a capacitor and inductor, which contribute to the reactive power without net energy transfer. To solve for the powers, one must analyze each component's voltage and current relationships at the specified frequency. Clarifying these concepts is essential for effectively working with AC circuits.
Dissonance in E
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Hi, I am a bit lost with AC circuits on the whole and could use some dumbed down explanation on the matter.

Taking an example from course material:

(Components connected in parallel. "Ladder connection")

------
l l l l l
J C L R
l l l l l
------

Where
J = 1 (30 degrees) currentsource driving current in the clockwise direction
C = 0.05 F capacitor
L = 0,2 H inductor
w = 10 rad/s

If I am asked to find the real and reactive powers for each component how would i go about solving these?
I could also use a clarification on the difference between real and reactive powers.

Thanks.

ps: sory for the dingy "diagram"
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Dissonance in E said:
If I am asked to find the real and reactive powers for each component how would i go about solving these?
I could also use a clarification on the difference between real and reactive powers.

Hi Dissonance in E! :smile:

Reactive power is just the imaginary part of the complex power, which is the (instantaneous) voltage times current.

(and reactive or imaginary power involves no net transfer of energy)
 

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