ECE 201 - Hw 20 - F11

# ECE 201 - Hw 20 - F11 - Homework 20 ECE201 Linear Circuit...

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Homework 20 ECE201: Linear Circuit Analysis Due in class: Friday, October 14, 2011 1. Consider the switches s 1 and s 2 in the circuit below. At time t = 0 - , the voltage on the capacitor is initially V C (0 - ) = 30V, and the current through the inductor is i L (0 - ) = 0A. At time t = 0 seconds, s 1 closes and s 2 stays open. And at time t = 3 seconds, s 1 opens and s 2 closes. Determine the following. a. Find the effective resistance seen by the capacitor at time t < 0 + . b. Determine the time constant of the circuit for time 0 < t < 3 seconds. c. Determine the current i C (0 + ). d. Determine the current i C (infinity) for the state of the system of interval 0 < t < 3 sec. e. Plot the current i C ( t ) for time 0 < t < 3 seconds. f. At time t = 3 + , determine the effective resistance seen by the inductor. g. At time t > 3 seconds, determine the time constant of the circuit. h. For time t > 3 seconds, determine charge q ( t ) on the capacitor. i.

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## This note was uploaded on 12/13/2011 for the course ECE 201 taught by Professor All during the Fall '08 term at Purdue.

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ECE 201 - Hw 20 - F11 - Homework 20 ECE201 Linear Circuit...

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