Answer
$u=49.4mJ$
Work Step by Step
We can find the total energy stored as:
$U=u(Al)$
We plug in the known values to obtain:
$U=34.189(17\times 10^{-4}\times 0.85)=49.4\times 10^{-3}=49.4mJ$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 30 - Induction and Inductance - Problems - Page 900: 67b
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