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AC steady state

  1. Nov 20, 2016 #1
    What is the difference between apparent power and complex power? How to differentiate them?
  2. jcsd
  3. Nov 20, 2016 #2


    Staff: Mentor


    Complex power is simply IV. It is a complex quantity, not just a single number, typically written as P+jQ, where P is real power and Q is imaginary power.

    Apparent power is the magnitude of complex power, ##\sqrt {P^2 +Q^2} ##. Apparent power is just a number, not a complex quantity.
  4. Nov 20, 2016 #3
    But both formula are S=Vrms*Irms ,right? Please correct me if i wrong.
  5. Nov 20, 2016 #4


    Staff: Mentor

    Yes, RMS quantities are usually used.
  6. Nov 20, 2016 #5
    Okay. Thank you.
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