The switch in Figure P7–57 has been open for a long time and is closed at t = 0. The circuit parameters are L = 4 H, C = 1 μF, R1 = 2.2 kΩ, R2 = 3.3 kΩ, and VA = 12 V.
(a) Find vC (t) and iL(t) for t ≥ 0.
(b) Is the circuit overdamped, critically damped, or underdamped?
(c) Use Multisim to validate your results.
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