Q- Consider the circuit in the figure. The switch is closed for long time prior to t = 0.
(a) Determine the voltage Vc across the capacitor before t = 0 and long time after t = 0
(b) Find the expression for the voltage across the capacitor as a function of time
(c) Determine the time constant after the switch is closed
(d) Plot the voltage across capacitor for -2 < t < 5 second
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