Programmed Review for Electrical Engineering, Third Edition
This text contains an organized review of the basic electrical engineering fundamentals, with 111 problems, solutions and explanations for the core electrical engineering concepts.
TABLE OF CONTENTS Programmed Review for Electrical Engineering, Third Edition
AC Circuits
The problems in this section illustrate that Ohm's Law works for ac circuits as well as dc circuits.
Problem 2-10: UNKNOWN DEVICE
Q:
You have been given a potted device and asked to determine the type and value of elements it contains. When connected to 120 volts, 60 Hz, 2 amps ac flow in each of the three paths, shown below:
Assume all elements are linear, passive, and bidirectional.
Answers
Q:
In order for all three currents to be the same magnitude, the current phasor diagrams must form an equilateral triangle as shown below (assume that I 1 is at 0 with respect to the ac source and that branch 2 is capacitive).
(answer)
(answer)
(answer)
(answer)
If your answers are correct, go on to Problem 2-11.
If your answers are not correct, review pp. 11 and 12.
Problem 2-11: PARALLEL BRANCHES
Q:
In the circuit that follows, calculate the power dissipated by the load:
Answers
Q:
(answer)
If your answer is correct, go on to Problem 2-12.
If your answer is not correct, review pp. 11 and 12.
Copyright Dearborn Financial Publishing, Inc. 2004 under license agreement with Books24x7
