Inductance problem

  • Thread starter dwn
  • Start date
  • #1
dwn
165
2

Homework Statement



An inductor has an inductance of 0.45 H and internal resistance of 2.5 . If the H
inductor is connected to a 120-V (rms) source at 60 Hz, what is the current (rms) through
it?

Homework Equations



XL=2pi*f*L
V=IR

The Attempt at a Solution



I don't have any idea and my brain is wrecked! I'm having a difficult time finding this bridge.
 

Answers and Replies

  • #2
You don't want to use V=IR, that doesn't take into account the reactance of your inductor. For a simple LR circuit V=IZ.
 
  • #3
dwn
165
2
Even using Z, I still arrive at 48 A. 120/2.5 = 48 A Which is not the correct answer. It is .7 A.
 
Last edited:
  • #6
NascentOxygen
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Science Advisor
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Homework Statement



An inductor has an inductance of 0.45 H and internal resistance of 2.5 . If the H
inductor is connected to a 120-V (rms) source at 60 Hz, what is the current (rms) through
it?
How do you determine the impedance of a series circuit of 0.45 H in series with a resistance of 2.5Ω ? You have studied complex number arithmetic?
 

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