Answer
$B_i=0.220 \mathrm{mT} $
Work Step by Step
Figure $32-35$ indicates that $i=10$ A when $t> 50 \mathrm{~ms}$. Thus,
$$
B_i=\mu_0 i / 2 \pi r=0.220 mT \mathrm{mT}
$$
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 32 - Maxwell's Equations; Magnetism of Matter - Problems - Page 968: 28c
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