Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 27 - Circuits - Problems - Page 795: 7b

Answer

$W_R=67 J$

Work Step by Step

Let energy dissipated as thermal energy in wire be $W_R$ $W_R=Pt$ We also know that power $P$ is given as $P=i^2R$ Thus $W_R=i^2Rt$ We plug in the known values to obtain: $W_R=(0.33)^2\times 5\times (2\times 60 sec)$ $W_R=66.7J \approx =67 J$
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