Fundamentals of Physics Extended (10th Edition)

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 857: 9a

Answer

The currents should be in opposite directions.

Work Step by Step

Suppose the currents are in the same directions. By the right hand rule, the magnetic field due to the current in each wire would be in opposite directions and the net magnetic field would be zero. Suppose the currents are in opposite directions. By the right hand rule, the magnetic field due to the current in each wire would be in the same direction. Therefore, the currents should be in opposite directions.
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