Stuck on AC circuit question

Discussion in 'Homework Help' started by kd3041, May 4, 2011.

  1. kd3041

    Thread Starter New Member

    Feb 2, 2011
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    Can someone explain to me how to do this question please. thanks
     
  2. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    A1 = A2+A3,

    A3 = A1-A2.

    All meters give RMS readings.
    U do the math
     
  3. kd3041

    Thread Starter New Member

    Feb 2, 2011
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    really? thats too simple. i thought the same thing but i wasnt sure
     
  4. Jony130

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    Feb 17, 2009
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  5. R!f@@

    AAC Fanatic!

    Apr 2, 2009
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    All true Jony, but OP's diagram gives nothing to compare phase difference or anything. Just simple math and RMS confusing thing to n00bs

    {ed}
    If there were an Inductor then that would be another story.
     
  6. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    Well for AC signals and RC/LR components the mother nature do not add "linear" but in geometric mean.

     I_{total} = \sqr{(I_{R}^2 + I_{C}^2)

    So the answer is

     I_{R}^2 = \sqr{(I_{total}^2 - I_{C}^2)} = \sqr{7} = 2.64575131A<br />
     
    Last edited: May 4, 2011
    anhnha and R!f@@ like this.
  7. R!f@@

    AAC Fanatic!

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    I sit corrected
     
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