Inductive Reactance

Discussion in 'Homework Help' started by alexander7, Oct 11, 2009.

  1. alexander7

    Thread Starter New Member

    Oct 11, 2009
    4
    0
    What alternating source voltage frequency is required to generate an inductive reactance of 10Ω in a 4 mH inductor?


    An Unknown inductor is wired to a source voltage alternating with a frequency of 120 HZ. Find the inductive reactance of the inductor if there are 240 mA of current flowing through it and 1.44 X 10-4 joules of potential energy stored inside its magnetic fiel.:confused:
     
  2. ATM

    Member

    Oct 8, 2009
    31
    0
    1. xL = 2piFL, we need to find the frequency, so we rearrange the equation to find f:

    f = xL / 2piL
    f = 10 / 2*pi*(4x10^-3)
    f = 387.89Hz

    2. For this question, you need to use the equation Energy = 0.5*L*I^2. Rearrange to find inductor value L. Then use the equation for number one to find its reactance.
     
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