Answer
$ac$ : $B = 0$
Work Step by Step
This exercise is just an application of Ampere's law.
$ac $ : $2\pi r \frac{B}{\mu} = I - I = 0 \Longrightarrow B = 0$
University Physics with Modern Physics (14th Edition)
by Young, Hugh D.; Freedman, Roger A.
Published by
Pearson
ISBN 10:
0321973615
ISBN 13:
978-0-32197-361-0
Chapter 28 - Sources of Magnetic Field - Problems - Exercises - Page 950: 28.43
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