RLC circuit in a black box

Thread Starter

Shane Caraker

Joined Mar 12, 2018
1
This one has me a bit stumped and I used to know how to do it!

Given a voltage and current (complete with frequency and phase shifts), determine the components within the black box.

For example: 24vac in at 1khz, 0degree. 6ma current, 1khz, 30degrees.

Since current lags voltage, it's inductive. The total impedance is 4k ohms. But what is done next to determine the components that make it up?
 

shteii01

Joined Feb 19, 2010
4,644
U know magnitude, frequency, angle. U use them to determine complex impedance.

Complex capacitor impedance=1/(j*2*pi*f*C)
 

MrAl

Joined Jun 17, 2014
11,396
This one has me a bit stumped and I used to know how to do it!

Given a voltage and current (complete with frequency and phase shifts), determine the components within the black box.

For example: 24vac in at 1khz, 0degree. 6ma current, 1khz, 30degrees.

Since current lags voltage, it's inductive. The total impedance is 4k ohms. But what is done next to determine the components that make it up?
Hi,

I have a feeling there are multiple answers if you really are to use an RLC. If it is just RL, then it will be down to just two circuits: one series and one parallel.
So decide if this should really be RLC or just RL and we can go from there.

Are you certain that you were not given any component values or any other constraints?
 
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