# impedance

Discussion in 'Homework Help' started by navyman, Oct 4, 2006.

1. ### navyman Thread Starter New Member

Sep 26, 2006
7
0
What is the impedance of a series combination of 100ohms and 10uF with a source of 60Hz??

I am lost on seting up the formula for this one.
Help???

2. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
Hi,

The capacitive reactance (Xc) = 1/2pi F C. Just add the answer to the value of the resistance.

3. ### navyman Thread Starter New Member

Sep 26, 2006
7
0
Got it !!
Thank You so much!!

4. ### n9352527 AAC Fanatic!

Oct 14, 2005
1,198
4
Shouldn't it be R - jXc instead of straight sum R + Xc?

5. ### JoeJester AAC Fanatic!

Apr 26, 2005
3,393
1,211
I agree with N93 ... It would be R -j ... not some straight addition.

Navyman ... you should review NEETS module 2 ... Introduction to Alternating Current and Transformers ... Chapter 4, Inductive and Capacitive Reactance should talk about impedance of the series circuit you described.

If not the NEETS books, try http://www.allaboutcircuits.com/vol_2/chpt_4/3.html on this site.