Va +1 625 NF H + Vo 400 Ω 25 mH + Vb

ne Q.15: The switch has been in position a' for a long time. At t-0 the switch is moved to position "b". Use classical method to find the voltage across and current through the capacitor as a function of time? (Ans.: Vc(t)=80[1.25-es t%=0 S 30V 452 100V 2uF 5000t (cos5000t+sin5000t)] V & ic(t)=1.6e 5000t sin5000t A)

The switch in the circuit of Figure P5.58 opens att = 0. It closes at t = 10 seconds.a. What is the time constant for 9 < t < 10 s?b. What is the time constant for t > 10 s?

8 For t > 0, the circuit shown in Figure P5.22 is at steady state. The switch is changed as shown at t = 0. Vsi = 35 V C = 11 µF Vsz = 130 V R = 17 k2 R = 7 k2 R = 23 k2 Determine the time constant of the circuit for t> 0.