7–57 The switch in Figure P7–57 has been open for a long time and is closed at t = 0. The circuit parameters are L=4H, C =1 μF, R1 =2:2 kΩ, R2 =3:3 kΩ, and VA =12V.

(a) Find vCðtÞ and iLðtÞ for t ≥ 0.

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

(c) Use Multisim to validate your results. Hint: In Grapher View plot vCðtÞ using the left axis and iLðtÞ on the right axis.

Transcribed Image Text:

R R2 W w m iL(t) + vc(t) C VA FIGURE P7-57