# Homework Help: Finding R and C from a parallel RC circuit

1. Mar 21, 2014

### Agent47

1. The problem statement, all variables and given/known data

A RC parallel circuit with an impedance of Z = 105000 Ω ∠ -27 and frequency of 50 Hz.

2. Relevant equations

I need to find out what the R and C values using the information given.

3. The attempt at a solution

I know the impedance for a parallel RC can be calculated from

1/Z = 1/R +jwc

Z can be converted to Z = 9355.69 -j47669 but from there i am completely confused on what to do next.

Any help will be much appreciated.

2. Mar 21, 2014

### Curiouschap101

Well you can calculate 1/Z and express it in a+jb form...Compare the real and imaginary parts then.

3. Mar 21, 2014

### Agent47

If i do 1/z i would get,

0.000008485 +j0.000004323

but im still not sure where R and C would come from.

4. Mar 21, 2014

### Staff: Mentor

[scientific notation would help curtail all those zeros ]

Equate the terms of your expression above to the numerical values of the conductance components...

5. Mar 21, 2014

### Agent47

I want to thank you both for your help.

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