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Unformatted text preview: EE2120 TEST No. 4 April 30, 2004 NAME (please print) SSN INSTRUCTIONS Failure to follow these instructions may result in your work NOT being accepted for credit. DO NOT OPEN THIS TEST UNTIL THE INSTRUCTOR TELLS YOU All work is individual. Concentrate on your own paper at all times STOP WORKING AS SOON AS THE INSTRUCTOR TELLS YOU When instructed, walk to the front and leave your work on the instruc- tors desk If you finish ahead of time, walk to the front and leave your work on the instructors desk SHOW ALL YOUR WORK VERSION 3 1. (30pts) For the circuit in the figure the switch has been at position a for a very long time. At time t = 0, the switch changes to position b . Using R = 3 ,L = 0 . 5 H,C = 2 25 F,V S = 12 V . (a) (10pts) Determine the differential equation for the capacitor voltage v C ( t ) , t > (b) (10pts) Determine the initial conditions v C (0+) , dv C dt (0+) (c) (10pts) Write the solution, y ( t ) ,t > 0, for the differential equation d 2...
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- Fall '08