Question

1) In the following circuit the switch has been closed for a long time and is opened at t0 S1 R1 ?0 V1 R2 L1 10H C1 (a) Find i1(0)=--, ife)- Ve(00) = 4 points (b) Write the differential equation for the circuit. 4 points (c) Write the circuit characteristic equation. 2 points (d) Determine the roots of the characteristic equation. 6 points (e) Is the circuit overdamped, critically damped or underdamped? 2 points

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