6. The switch in the circuit shown below open at $t = 0$. The circuit was in steady-state prior to $t = 0$.
(10 points)
$V_s = 50 V$
$R_s = 10 \Omega$
$R_1 = 30 \Omega$
$R_2 = 60 \Omega$
$I_x = 3 A$
$C = 47 \mu F$
(1) Find and draw the single-loop equivalent of this circuit for $t \ge 0$.
(Hint: Prepare the Thevenin equivalent circuit, converting from $I_x$)
➤ Answer:
(2) Find the time constant of this circuit.
➤ Answer:
$\tau = $