Answer
$\phi = 30^{\circ}$
Work Step by Step
We can find the phase angle:
$P = P_{max}~cos^2~\phi$
$0.75~P_{max} = P_{max}~cos^2~\phi$
$cos^2~\phi = 0.75$
$cos~\phi = \sqrt{0.75}$
$cos~\phi = 0.866$
$\phi = cos^{-1}~(0.866)$
$\phi = 30^{\circ}$
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (3rd Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0321740904
ISBN 13:
978-0-32174-090-8
Chapter 35 - AC Circuits - Exercises and Problems - Page 1052: 31
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
