Q2 The circuit below has been connected for a long time and all transients have dissipated. The switch is then opened at

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Q2 The Circuit Below Has Been Connected For A Long Time And All Transients Have Dissipated The Switch Is Then Opened At 1 (55.08 KiB) Viewed 12 times

Q2 The circuit below has been connected for a long time and all transients have dissipated. The switch is then opened at t = 0 seconds. (a) Draw the equivalent circuit when t<0. (b) Draw the RC circuit when t>0, and find its time constant. (Ans: T = 20ms) (c) Find V(t) for all time. (Ans: 200 V fort s 0,200e^(-50t) V fort > 0) (d) Sketch V(t), labelling the axes and the initial point. (e) Find the initial energy stored in the capacitor. (Ans: 8mJ) (1) Find the length of time required to dissipate 75% of the initial stored energy. (Ans: 13.9ms) t=0 20kΩ + 7.5mA(1 80k 2 0.44F V() 50kΩ