Answer
Yes.
Work Step by Step
The value of the magnetic field, $3.3\mu T$, could alter the values of magnetic field by as much as $$\frac{3.3 \mu T}{20 \mu T}=16.5 percent$$ Therefore, this could interfere with the compass reading.
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 29 - Magnetic Fields Due to Currents - Problems - Page 856: 1b
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