In the circuit of Figure P27.25, the switch S has been open for a long time. It is then suddenly dosed. Take e = 10.0 V, R1= 50.0 kΩ, R2 = 100 kΩ, and C=10.0 pF. Determine the time constant (a) before the switch is dosed and (b) after the switch is dosed. (c) Let the switch be closed at t= 0. Determine the current in the switch as a function of time.
