Answer
$\phi_t=0^{\circ} \text {}$
Work Step by Step
$\text { } \phi_t=\tan ^{-1}\left(2 \tan \lambda_m\right)\\=\tan ^{-1}(0)=0^{\circ} \text {. }$
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 971: 62b
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