1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Average power in AC circuit

  1. Apr 16, 2010 #1
    1. The problem statement, all variables and given/known data

    Given resistance of circuit 68 W, I(max) = .191 A, V(max) = 22.5, what is the average power of this circuit?

    2. Relevant equations

    P(avg) = I(avg)V(max)

    3. The attempt at a solution

    I took .191 and divided by sqrt(2) to get the rms current and multiplied by the max voltage 22.5. Not getting the right answer, though...
  2. jcsd
  3. Apr 16, 2010 #2


    User Avatar
    Homework Helper

    P(avg) = I(avg)V(max)
    It should be
    P(avg) = I(avg)V(avg)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook