Fundamentals of Electrical Engineering

Published by McGraw-Hill Education
ISBN 10: 0073380377
ISBN 13: 978-0-07338-037-7

Chapter 2 - Fundamentals of Electric Circuits - Part 1 Circuits - Homework Problems - Page 51: 2.21


current source: $P=-36W$ (delivered) R: $P=30W$ (absorbed)

Work Step by Step

First calculate V1 using KVL $ΣV = 5 -3 +10 -v1 =0$ $v1=12V$ now calculate the power of the current source, multiply by a negative to put it into passive convention $P = -(12*3)=-36W$ (delivered) Now for the resistor, the current is 3A from the source, and is already in passive convention $P = 10 * 3 = 30W$ (absorbed)
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