# Parallel ciruits (AC)

Joined Feb 11, 2019
22
C = 481.7 nF
L = 56.91 mH
R(L) = 36 Ω

Z(capacitor) = -(1/jwC)
Z(coil) = R(L) + jwL

My question is: What is Z(capacitor) // Z(coil) ?
This is my attempt to solve:

Joined Feb 11, 2019
22
I want to get Z(capacitor) // Z(coil) in the format: x + jy

#### WBahn

Joined Mar 31, 2012
25,277
How do you put something like

1/(a+jb) into the form x+jy?

Joined Feb 11, 2019
22
How do you put something like

1/(a+jb) into the form x+jy?
I dont know but this thread can be marked as solved.
For this particular circuit i used the formula Z = L/RC

#### WBahn

Joined Mar 31, 2012
25,277
I dont know but this thread can be marked as solved.
For this particular circuit i used the formula Z = L/RC
So you don't care about learning the basic math needed to work with complex numbers? Okay, your choice.

That formula that you found somewhere and are using blindly is the Z for what and under what conditions?

Doesn't it strike you as at least a bit odd that Z is independent of frequency?

BTW, Z(capacitor) = -(1/jwC) is not correct.