First slide
Phasors and Phasor Diagrams
Question

An alternating voltage v = 300 2sin(60t)  (in volts) is connected across a 4 μF capacitor through an a.c. ammeter. The  reading of ammeter will be 

Easy
Solution

V0=3002          Vrms=V02=300Volt

I=VrmsXC=vrms×ωc=300×60×4×106

I=72×103A;I=72mA

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