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Electric Circuit Theory Exam Prep

This document contains a practice midterm exam for an electric circuit theory course. It consists of 5 practice problems testing concepts like equivalent resistance, current dividers, voltage measurements, controlled current sources, and load line analysis. The student is asked to find equivalent resistances, voltages, current values, and determine power consumption for various resistive circuits under different conditions.

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Allie June
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217 views2 pages

Electric Circuit Theory Exam Prep

This document contains a practice midterm exam for an electric circuit theory course. It consists of 5 practice problems testing concepts like equivalent resistance, current dividers, voltage measurements, controlled current sources, and load line analysis. The student is asked to find equivalent resistances, voltages, current values, and determine power consumption for various resistive circuits under different conditions.

Uploaded by

Allie June
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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ECEN 214 - Electric Circuit Theory

Fall 2017
Practice Midterm Exam #1

Problem 1 (20 points) a


Find the equivalent resistance of each of the
resistive networks shown. 1 1

1 1 R ab

1 1

R cd
1

1 1

Problem 2 (20 points)


io
Design the current divider (that is, find values of R 1 and
R 2 ) so that the output current is i o = 1.8 mA and the cur- 5mA R1 R2
rent source produces 1mW of power.
Problem 3 (20 points)
8
(a) Find the voltage, v o , across the 4 resistor on the
right edge of the circuit shown.
2A
(b) State whether the 2A current source is consuming
or delivering power. Specify how much.
6 +
+
_ 12V 4 4 vo
_

Problem 4 (20 points)


_
(a) Find v o , the voltage across the 30 resistor.

+
_
(b) State whether the controlled current source is 10V
consuming or delivering power. Specify how much. 40 20
ia
+

10 2i a 30 vo
_

Problem 5 (20 points)

You construct the circuit shown below in


the lab and measure the load current, i L , RL

and load voltage, v L , for a few different iL + vL _


load resistors, R L . Your results are shown
in the table below. Find the value of R L 6k
needed to produce a load current of
i L = 1 mA.
+
_ 12V 18k 12k
2mA

RL iL vL 24k

Open 0mA 12V

1k 2.4mA 2.4V

Short 3mA 0V

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