- #1
fonz
- 151
- 5
Homework Statement
Find the complex parallel impedance of a 20 Ω resistor and 110 mH inductor from a 50 Hz supply.
Homework Equations
Z = R (XL2 / R2+XL2) + j XL (R2 / XL2 + R2)
The Attempt at a Solution
[/B]
R = 20 Ω
XL = j34.6 Ω
Z = 20 ( j34.62 / j34.62 + 202) + j34.6 ( 202 / j34.62 + 202) Ω
Z = 20 ( -1197 / 400 - 1197 ) + j34.6 ( 400 / 400 - 1197 ) Ω
Z = 30 - j17 Ω
Apparently this is wrong but I can't find where I have gone wrong.
Thanks