ECE 2054
Applied Electric theory
Test 1
Fall 2024
1. Questions
20
____
2. Problem 1
20
____
3. Problem 2
20
____
4. Problem 3
20
____
5. Problem 4
20
____
Problems Total
100
____
I pledge that I have not given nor receive any unauthorized help on this examination
___________________________
Signature
____________________________
Name
Multiple Choice Questions (1 point each)
1) Two resistors of different size have the same voltage; they are more likely connected in:
a) series
b) parallel
2) The current in a resistor is linear with respect to its
a) voltage
b) charge
c) energy
d) power
3) you do not need a short circuit current to determine the load-line of a linear circuit
a) True
b) False
4) The voltage polarity in a resistor is positive at the node where the current exits the resistor.
a) True
b) False
5) KVL and KCL apply only to linear circuits.
a) True
b) False
Multiple Choice Questions (3 points each)
1) Why is source transformation (Thevenin/Norton) possible?
2) Use two words to give an accurate description of voltage.
3) What allow you to use a Thevenin equivalent to replace a portion of a circuit?
4) What is the purpose, related to nodes, of putting a ground in one node of a circuit?
5) What is the difference between terms resistor and resistance?
Problem 1 (20 points)
Determine the value of Vy, Iy, Vx, Ix and Is for the given circuit. Show all your work.
𝑽𝒀
_______________ (2 points)
𝑰𝒀
_______________ (3 points)
𝑽𝑿
_______________ (5 points)
𝑰𝒀
_______________ (4 points)
𝑰𝑺
_______________ (6 points)
Problem 2 (20 points)
Set the ground in the given circuit at the node that allows you to obtain the minimum number of
equations when applying node analysis. (5 points)
Label your unknown node voltages (2 points)
List your node analysis independent equations in terms of your unknown node voltages divided by
resistors. (10 points)
Give an expression of Ix in terms of your known node voltages (3 points)
Problem 3 (20 points):
Use your preferred method for circuit analysis (Mesh or Node analysis) to set the equations needed to
find 𝐼 in the given circuit. Provided the listed intermediate steps for full credit.
List your preferred method: ______________________ (1 point)
Label your circuit according (2 points)
Mark or list any special node or mesh (3 points)
List your independent equations in standard form (10 points)
Give and equation for Ix in terms of your Node voltages or Mesh currents (4 points)
Problem 4 (20 points):
Find the value of Rx in the given circuit. Show your work and the requested intermediate values to get full
credit.
𝑉
:_________________ (5 points)
𝐼
:_________________ (5 points)
𝑉
:_________________ (3 points)
𝐼
:_________________ (3 points)
𝑅 :_________________ (4 points)