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NCERT Class XII Chapter
Alternating Current
Questions With Solutions

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Question : 4
Total: 26
A 60 µF capacitor is connected to a 110 V, 60 Hz a.c. supply. Determine the rms value of current in the circuit.
Solution:  
Capacitive reactance XC =
1
2πfC

XC =
1
2×π×60×60×10−6
 = 44.2 Ω
The rms current is Iv =
Ev
XC
 =
110
44.2
 = 2.5 A
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