Question

QUESTION 1 The switch in the circuit seen in Figure has been in a position @ for a long time. At t= 0 ,the switch moves instantaneously to position b AVM 10 kg 12.5 kg 120 (*) 150 kn ? 50 kn volt) = 40 nF ms Fill in the following values: Whent < 0: initial value Vc(0-) = When t = 0: Vo = When t > 0, time constant T = When t= 00, VF =D The final expression v(t) = *Write vſt) in this manner: v(t) = VF + (VO-VF) e^ -yt where y=

Answer 1

Answer 1 so circuit at aruit is behaues as t=0 steady state open circut capacitor in lour ce] + . y Cory a 120v I VCO) = 120V = VCO +) 2) at tzo - Vo= ů (o) = &Cot) = 120 volt t= Reg. c 3) time constant - calculation of Req- 12.5kn onem г 150 23 $ 50 кг. Reg a 150x50 + 1205 150 + 50

Req = 5002 T = 50x103 x 4oxios T= 2000xio secona T= 2ms 4) for to at dan steady state switch is at circuit will so capacitor is position (6) and again reach in again behames as Open circuito F 150 150 (1) uma Voor) Velas VII l I - - By current division rule- T, e kx 50 1 min 750750 Yoo) = VF = 150X1 TUE = 150 volt 5 Velts = v(s) + [velot) - V (b)] e the VC) = 150+ [120-150] e tetos e 500t O(A) = 150-30e volt where is in A secona