Answer
$U=17.9$ pJ
Work Step by Step
We know that:
$U=\frac{1}{2}LI^2$
We plug in the known values to obtain:
$U=\frac{1}{2}(0.689\times 10^{-6})(7.20\times 10^{-3})^2=17.9\times 10^{-12}=17.9pJ$
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 31 - Electromagnetic Oscillations and Alternating Current - Problems - Page 940: 85b
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