The switch in Figure P7–53 has been open for a long time and is closed at t ¼ 0. The circuit parameters are L ¼ 1.25 H, C ¼ 0.05 mF, R1 ¼ 20 kV, R2 ¼ 20 kV, and VA ¼ 20 V.

(a) Find vC(t) and iL(t) for t 0.

(b) Is the circuit overdamped, critically damped, or underdamped?

(c) Use OrCAD to simulate your results.

Transcribed Image Text:

VA + R1 t=0 R2 w el iL(t) + vc(t) LC FIGURE P7-53