test3

test3 - 1 EE2120 TEST No. 3.V1 December 4, 2002 NAME(please...

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Unformatted text preview: 1 EE2120 TEST No. 3.V1 December 4, 2002 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 instructor’s desk • If you finish ahead of time, walk to the front and leave your work on the instructor’s desk • SHOW ALL YOUR WORK Prepared by Dr. Jorge L. Aravena. Last revised on December 4, 2002 2 1. (25pts) For the circuit in the figure use R1 = 4kΩ, R2 = 3k Ω, R3 = 6kΩ, RL = 10k Ω (a) (15pts) Use Thevenin to determine the current IO . (b) (5pts) What value of RL would maximize the power transfer? (c) (5pts) For the value of RL computed in part (1b) determine the power transferred to the load resistance RL . R2 4mA 12V + − R1 IO RL R3 Prepared by Dr. Jorge L. Aravena. Last revised on December 4, 2002 3 2. (25pts) For the circuit in the figure, R1 = R2 = R3 = 4kΩ, R4 = 3kΩ, a = 2. (a) (20pts) Determine the Thevenin equivalent circuit at terminals a − b (b) (10pts) If an external resistor Rab = 5k Ω is connected between terminals a − b determine the power absorbed by the resistor Rab . 12V R1 aVx − R2 + − + R4 + Vx − a R3 b Prepared by Dr. Jorge L. Aravena. Last revised on December 4, 2002 4 3. (25pts) For the circuit in the figure (a) (15pts)determine the power transferred to the load RL as function of the parameter a. (b) (10pts)Determine the value of a to insure maximum power transfer to the load RL . Hint: Use Thevenin theorem aVX 9V + 2kΩ − + VX − RL Prepared by Dr. Jorge L. Aravena. Last revised on December 4, 2002 4. (30pts) For the circuit in the figure,L = 10mH, C = 100µF , v (t) = cos103 t. If iL (0) = 0. vt () + − L C Determine (a) The current through the capacitor for t > 0 (b) The current through the inductor for t > 0 (c) The total energy stored in the circuit (INDUCTOR PLUS CAPACITOR)for t > 0 (d) The instantaneous power supplied to the capacitor for t > 0 (e) The instantaneous power supplied to the inductor for t > 0 (f) The current supplied by the source for t > 0 5 ...
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This note was uploaded on 12/01/2011 for the course EE 2120 taught by Professor Aravena during the Fall '08 term at LSU.

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