(Show your work and explain it, label your circuits, show voltages and
currents, how you find the answer.)
The switch in the circuit has been open a long time before closing at t=0. Find
$I_L(t)$, $v_c(t)$, $I_1(t)$, $I_2(t)$ for $t \ge 0$
100 ?
1
+
30 mA
+
$I_L$
20 mH
$V_c$
20V
100 ?F
25 ?
?
a) Draw the circuit for t< 0 and find $I_1(0)$, $v_c(0)$, $I_1(0)$, $I_2(0)$
b) Draw the circuit for t -> ? and find $I_1(\infty)$, $v_c(\infty)$, $I_1(\infty)$,
$I_2(\infty)$ (note: replace voltage sources by Short circuit (a line) and currents sources by open
circuit)
c) Draw the circuit for t>0 is the circuit RLC series or parallel?
What is R, L, C
Find Alpha
Find Omega_0 = ?0
How is the response?
find $I_1(t)$, $v_c(t)$, $I_1(t)$, $I_2(t)$ for $t \ge 0$