ENGR201E_2019S_MIDTERM2.pdf - Oregon State University ENGR 201 Electrical Fundamentals I Spring 2019 Midterm Exam#2 Time Allowed 50 minutes MIDTERM

# ENGR201E_2019S_MIDTERM2.pdf - Oregon State University ENGR...

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Page 1 of 5 Oregon State University Midterm Exam #2 ENGR 201 Electrical Fundamentals I Time Allowed: 50 minutes Spring 2019 MIDTERM EXAM #2 Printed Name: _________________________________ ONID: ____________________________ Instructions for this exam: You must work alone. You may use a calculator. All work must be completed directly in the printed exam handout. No books, notes, or any outside sources of information may be consulted. Show all work to receive partial credit for a solution. Box final answers and use correct units. Answers may not be integers. There are four problems, not all of equal value. Total points possible: 80 Provided Equations: V = I * R P = I * V
Page 2 of 5 1)Consider the circuit diagram below. a.Use mesh analysisto determine Iy. [18 points] b.What is the voltage Vx? [4 points] c.What is the power delivered by the 0.9Asource? [3 points] 10 V 0.9 A 5 Ω 2 Ω 10 Ω 10 Ω Iy Vx + -
Page 3 of 5 2)Consider the circuit diagram below: a.Calculate and draw the Thevenin equivalent between terminals Aand B. [14 points] b.Calculate and draw the Norton equivalent between terminals Aand B. [8 points] c.We connect a 12Ωresistor between Aand B; calculate VABwith resistor attached. [3 points] 10 V 0.4 A 20 Ω 40 Ω 40 Ω A B
Page 4 of 5 3)Consider the circuit diagram below. Usesuperpositionto find current Ix as drawn. [25 points] Draw all sub-circuits in your analysis to receive full credit. 8 V 2 V 2 A 2 Ω 6 Ω 8 Ω Ix
Page 5 of 5 4)Consider the 12V source and 6Ωresistor shown below. What might happen if we attached a current source to these elements at Aand B? Be sure to show or draw your work to receive credit. a.Determine the voltage VABwith the current source #1 attached at Aand B. [3 points] b.Determine the voltage VABwith the current source #2 attached at Aand B. [2 points] Current Source #1: Current Source #2: 12 V 6 Ω A B 2 A A B 2 A A B
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