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A parallel plate capacitor made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s^(-1).What is the rms value of the conduction current ? |
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Answer» SOLUTION :Here current in A.C. circuit, `I_(rms)=(V_(rms))/(|Z|)` `I_(rms)=(V_(rms))/(X_(C )) ""` (`because` Here only capacitor is CONNECTED and so `|Z|=X_(C )`) `therefore I_(rms)=(V_(rms))/(((1)/(omega C)))=V_(rms)xx omega C(because X_(C )=(1)/(omega C))` `therefore I_(rms)=(230)(300)(100xx10^(-12))` `therefore I_(rms)=6.9xx10^(-6)A` |
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