Question

QUESTION 3 [40 marks] (1) [20 marks] Find the Thevenin equivalent of the circuit given in Figure 5. 40 оа 6Ω 0.25 Vx W 8V ЗА 4Ω b Figure 5 (ii) [20 marks] In the circuit of Figure 6, the switch has been in the close position for a long time before opening at time t = 0; a. (2 marks) Find the capacitor voltage v.(0) for t < 0. b. (15 marks) Give an expression for the capacitor voltage ve(t) (i.e., as a function of time) for t > 0. C. (3 marks) Give an expression for the 6-12 resistor current ion(t) (i.e., as a function of time) for t> 0. 522 t=0 6Ω + 2A 120 2002 1 F Vc 20 V w w

Answer 1

clot = 12.10 100) = 16 0 Calculate the value of time constant at time to SR b 612 С. 2012 Isyre Node shifting Method b a G C 200 jartz fogai 512 = 42 100 25 612 20115=2005 2015 unb V b 612 - 684 =1012 Rey (=IF Time constant Tz Reg C T = loxe T=losee

we know that -tli Pre (60) Velt) = frecot) _v_(m)] e veid) = 19.1V (100)=16V ī=losec relt) 12.1–16] eth t 16 = +16 solution of velt) = -3.9ethio velt) = 16–3.9 et/10

Answer 2

question? Convert the following circuit into a)thevenin equivalent circuit b)using the above thevenin equivalent ,convert it into nortion equivalent circuit. v=3.6v,R1=3ohm,R2=6ohm and terminal a and b?