1. Refer to the DC circuit shown in Figure 1 with the parameters V = 120 V, R₁ = 100, R₂ = 150 , C = 100 μF. Assume the

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1. Refer to the DC circuit shown in Figure 1 with the parameters V = 120 V, R₁ = 100, R₂ = 150 , C = 100 μF. Assume the switch has been closed for a long time and it is opened at time t = 0 s. t=0 s R₁ www ic Vs Ve C R₂ Figure 1 Assume that prior to opening the switch, the capacitor is fully charged by the source. (a) Calculate the voltage ve and the current ic just before the switch is opened (at t=0 s). [2 marks] (b) Calculate the time constant of the circuit before the switch is opened. [2 marks] (c) Calculate the time constant of the circuit after the switch is opened. [5 marks] (d) Calculate the voltage ve and the current i just after the switch is opened (at t =0*s). [6 marks] (e) Calculate the time it will take for the capacitor to reach a new steady-state voltage after the switch is opened. [2 marks] (f) Calculate the steady-state voltage reached at the time calculated in Part (e). [3 marks] (g) Calculate the energy stored in the capacitor at t = 0 s. [2 marks] (h) Plot the voltage ve and the current ic for t> 0 s. Show the transient response until they reach a new steady-state (Indicate clearly which graph shows the current and which graph shows the voltage and include the time scale on the x-axis). [3 marks]