In the circuit shown in Figure, switch SW1 closes at t = 0 s. Switch SW2 is subsequently closed at t = 1/60 s and then at t = 1/30 s it opens again. If the AC power supply is V(t) = 220 sin (120?t) and the initial conditions are: VC(0- ) = 0 V and iL(0- ) = 0 A
Calculate and plot iSW2(t), VSW2(t), iL(t) and VC(t), in the interval 0 ? t ? 1 /20 s.