The switch in Figure P7–55 has been in position A for a long time. At t ¼ 0 it is moved to position B. The circuit parameters are R1 ¼ 20 kV, R2 ¼ 4 kV, L ¼ 1.6 H, C ¼ 1.25 mF, and VA ¼ 24 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:

R A ww t=0 R w iL(t) B + VA vc(t) = COL A FIGURE P7-55