Need helping studying for a test

Thread Starter

Beelze

Joined Mar 20, 2012
2
I am studying for a test that will be given next week. This is one of the problems that I will encounter. How do I find the capacitance of C1 with these given values?
 

qtlj657

Joined Mar 18, 2012
7
calc the current through R1=42v/100Ω=420mA. that's the total current of the circuit.
The total impedance= V total/I total =120V/420mA=285.71Ω
for (Total impedance)^2=(R1)^2+(Xc1)^2. 285.71Ω^2=100Ω^2+ (Xc1)^2. the impedance of C1=267.6 Ω

for the formula X=1/(2∏fC). 267.6Ω=1/(2*∏*60Hz*C), can know C=9.91μF
 
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