Question: 971 Solving State Variable Equations With zero input, a series RLC circuit can be described by the following coupled first-order equations in the inductor current

9–71 Solving State Variable Equations With zero input, a series RLC circuit can be described by the following coupled first-order equations in the inductor current iLðtÞ and capacitor voltage vCðtÞ.

dt dvc(1)i (1) C di(t) R dt = -vc(1) - iL (1)

(a) Transform these equations into the s domain and solve for the transforms ILðsÞ and VCðsÞ in terms of the initial conditions iLð0Þ = I0 and vCð0Þ =V0.

(b) Find iLðtÞ and vCðtÞ for R= 100 Ω, L= 100mH, C = 1 μF, I0 = 10 mA, and V0 =15V.

dt dvc(1)i (1) C di(t) R dt = -vc(1) - iL (1)

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