ECE 201 Fall 2009 Exam 1 September 21 2009 Division 0101 Tan 11 30am Division 0201 Clark 7 30 am Division 0301 Elliott 1 30 pm Instructions 1 DO NOT START UNTIL TOLD TO DO SO 2 Write your Name division professor and student ID PUID on your scantron sheet 3 This is a CLOSED BOOKS and CLOSED NOTES exam 4 There is only one correct answer to each question 5 Calculators are allowed but not necessary 6 If extra paper is needed use back of test pages 7 Cheating will not be tolerated Cheating in this exam will result in an F in the course 8 If you cannot solve a question be sure to look at the other ones and come back to it if time permits 9 As described in the course syllabus we must certify that every student who receives a passing grade in this course has satisfied each of the course outcomes On this exam you have the opportunity to satisfy outcomes i ii and iii See the course syllabus for a complete description of each outcome On the chart below we list the criteria we use for determining whether you have satisfied these course outcomes Course Outcome Exam Questions Total Points Possible i ii iii 1 8 9 12 13 14 56 28 14 Minimum Points required to satisfy course outcome 28 14 7 If you fail to satisfy any of the course outcomes don t panic There will be more opportunities for you to do so 1 1 The current i t conducted along a wire is shown in the plot Choose the plot that best represents the charge q t that has passed along the wire during the interval from t 0 to t 2 2 The current i t through an element and the power it absorbs p t are as shown in the plots Which of the following plots best represents the energy absorbed by the element in the interval from t 0 to t 3 3 Determine the equivalent resistance Req 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 4 Determine the expression of Vout t 1 Vout R1 Vin R1 R2 R3 R4 2 Vout R1 R2 Vin R1 R2 R3 R4 3 Vout R1 R2 R3 R4 Vin R2 R3 R4 4 Vout R2 R3 Vin R1 R2 R3 R4 5 Vout R2 R3 R4 Vin R1 R2 R3 6 Vout R2 R3 R4 Vin R1 7 Vout R1 Vin R2 R3 R4 8 Vout R2 R3 R4 Vin R1 R2 R3 R4 4 5 If 4 W of power is absorbed by the 16 resistor then determine the amount of power delivered by the 12 V voltage source All that is known about the third rectangular element is that it absorbs power 1 1W 2 2 W 3 3W 4 4 W 5 5 W 6 6 W 7 7 W 8 8 W 6 Determine the current ix 1 1 A 2 2 A 3 3 A 4 4 A 5 5 A 6 6 A 7 7 A 8 8 A 5 7 Determine the value of the voltage Vx across the 3A current source 1 0 V 2 4 V 3 8 V 4 6 V 5 10 V 6 5 V 7 4 V 8 12 V 8 Determine the current i2 passing through the 5V independent voltage source 1 1A 2 2A 3 3A 4 4A 5 5A 6 6A 7 7A 8 8A 6 9 The voltage at node A in the circuit below is 1 1 V 2 2 V 3 3 V 5 5 V 6 6 V 7 7 V 4 4 V 10 The equivalent resistance Req of the network consisting of the dependent current source and the resistor shown below is 1 1 2 2 3 3 5 5 6 6 7 7 4 4 7 11 The matrix form of the loop equations of the circuit shown below is as follows 30 10 I1 Vo 2 1 I 0 2 What is the value of RL 1 10 2 20 3 30 5 50 6 60 7 0 4 40 12 The power absorbed by the dependent source in the circuit shown below is 1 0 W 2 8 W 3 3 2 W 5 1 6 W 6 1 28 W 7 1 28 W 8 4 2 W 13 In the figure below the rectangular box represents a linear network containing no independent sources The table to the right gives the value of Vout measured for various values of Is and Vs Determine the voltage Vs that when Is 2A corresponds to Vout 10V Is 1A 0A 2A 1 6V 2 4V 3 2V 4 0V 5 2V 6 4V 7 6V Vs 2V 5V Vs Vout 5V 20V 10V 14 Using superposition determine the current I1 in the following network 1 3A 2 2A 3 1A 5 1A 6 2A 7 3A 4 0 9
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