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Am i on the right track

  1. May 19, 2012 #1
    1. The problem statement, all variables and given/known data
    i = 15 sin(100π.t + 0.6)
    a) I need to state the initial phase angel in rads and degrees.
    b) I also need to work out current at first maximum value.


    2. Relevant equations
    i=A*sin(ωτ+∅)


    3. The attempt at a solution

    a) ∅=100∏*0+0.6
    ∅= 0.6 rads. ∴0.6*180/∏=34.37746771°

    b) first current max =∏/2 rad's
    100∏τ+0.6=∏/2
    100τ+0.6=1/2
    200τ+1.2=1
    t=1/(200+1.2)
    t=4.970178926*10^-3
     
    Last edited: May 19, 2012
  2. jcsd
  3. May 19, 2012 #2
    You've made an algebraic mistake in your part b), but yes, you are on the right track. By the way, a thread like this belongs in the "Introductory Physics" forum, not the Calculus forum.
     
  4. May 19, 2012 #3
    where abouts did i go wrong?
     
  5. May 19, 2012 #4

    tiny-tim

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    :redface:
     
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