Engineering Board Exam Reviewer · RC Circuits · hard
A resistor and a capacitor in series draw 4 A from a 240 V, 50 Hz source, and the current leads the voltage by 30°. Find the capacitance.
- 61.3, F
- 106, F
- 53.1, F
- 667, F
Answer
B. 106, F
Solution
|Z|=V/I=240/4=60, . XC=|Z| =60 30°=30, . C=1/2π fXC=1/2π(50)(30)=106, F.
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