1) An alternating voltage is connected to as series RL circuit through a switch, and the switch is closed at t= l} s

1) An alternating voltage is connected to as series RL circuit through a switch, and the switch is closed at t= l} s. Details of the circuit are as: R= 15 ?, L=U.12 H. Vm= IDDV, an H: a} Find the value of the DC component of the current if instantaneous voltage at t = [i s is 50 V. b} What are the conditions for closing the switch such that the DC components of the current are maximum and zero, at t = l} s? Find the instantaneous value of the voltage for each case at t= II] 5. c) If the instantaneous voltage is zero at t = {i s. Find the value of instantaneous current after [1.5, 1.5 and 5.5 cycles.