Homework 3

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Lehigh University *

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Course

81

Subject

Mechanical Engineering

Date

Apr 3, 2024

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pdf

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6

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ECE 81 Homework #3 Due 9/17/21 on line submission by 11:55pm Name:_________________________ id#_______________________ a) PRINT THIS SET, b) WRITE YOUR SOLUTIONS ON IT (use extra sheets of paper if you need extra space), c) SCAN the PAGES, and d) SUBMIT a single PDF file ON COURSE SITE.
Problem #1 (20 points) For the circuit shown in the schematic below determine the node voltage V x and the branch current I x as shown by applying the node voltage method. 40 W 10 W 20 W 20 W 40 V 10 A V x I x
Problem #2 (20 points) For the circuit shown in the schematic below determine the node voltage V x and the branch current I x as shown by applying the mesh current method. How is your answer compare with the answer of problem 1. 40 W 10 W 20 W 20 W 40 V 10 A V x I x
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Problem #3 (20 points) Determine the current I x across the 23 Ohm resistor as shown in the following circuit by using the node voltage method. How is your answer compare with the answer of problem 4 of HW#2. + _ 200 V 20 A 23 W 27 W 47 W 4 W I x
Problem #4 (20 points) Determine the three currents i a , i b and i c as shown in the following circuit by using the mesh current method.
Problem #5 (20 points) a) Which of the two following methods would be easier to analyze the circuit shown below: node voltage method or mesh current method? b) Using the method selected in part a above, determine the power that is associated with each of the three sources. c) Determine if the power associated with each source is delivered or absorbed.
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