Physics Technology Update (4th Edition)

Published by Pearson
ISBN 10: 0-32190-308-0
ISBN 13: 978-0-32190-308-2

Chapter 24 - Alternating-Current Circuits - Problems and Conceptual Exercises - Page 867: 4

Answer

a) $0.11KW$ b) $0.22KW$

Work Step by Step

(a) We can find the average power consumed as $P_{avg}=I_{rms}^2R$ We plug in the known values to obtain: $P_{avg}=(0.85)^2(150)=110W=0.11KW$ (b) We can find the maximum power as $P_{max}=I_{rms}^2(\sqrt{2}I_{rms})^2$ $P_{max}=2(I_{rms} R)$ We plug in the known values to obtain: $P_{max}=2(110)=0.22KW$
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