Homework 19 ECE201 Linear Circuit Analysis Due in class Wednesday October 12 2011 1 The configuration of an RC circuit is given below a Find the effective resistance seen by the capacitor b Determine the time constant of the RC circuit c If V t 10u t and VC 0 0V plot VC t for 0 t 2 seconds d If V t 10u t and VC 0 4V plot VC t for 0 t 2 seconds e If V t 10u t and VC 0 2V plot iC t for 0 t 2 seconds 2 The configuration of an RL circuit is given below The switch is initially open and at time t t0 the switch closes The values of R and L are R 3 and L 2H The initial voltage across each inductor at t 0 is zero a Find the time constant 1 of the circuit when the switch is open b Find the time constant 2 of the circuit when the switch is closed c If i 0 2A and t0 1 plot Vout t for 0 t 1 d If i 0 2A and t0 1 plot Vout t for 0 t 1 2 e If i 0 2A and the switch closes at t 1 but opens again at t 2 then what is the voltage VL across the 3L inductor at time t 2 1 2
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