Question

The rms value of the conduction current in a parallel plate capacitor is 6.9 μA. The capacity of this capacitor, if it is connected to 230 V ac supply with an angular frequency of 600 rad/s, will be :

• A. 5 pF
• B. 50 pF
• C. 100 pF
• D. 200 pF

Answer 1

Answer: (B)

50 pF

Answer 2

Current in capacitor I=$\frac{V}{X}$C
I=(V)×(ωC)
C=$\frac{I}{V\omega}$=$\frac{6.9×10^{−6}}{230×600}$
=50 pF