College Physics (7th Edition)

Published by Pearson
ISBN 10: 0-32160-183-1
ISBN 13: 978-0-32160-183-4

Chapter 20 - Electromagnetic Induction and Waves - Learning Path Questions and Exercises - Conceptual Questions - Page 724: 7

Answer

The diameter must be shortened to prevent induced current in the metal loop.

Work Step by Step

To prevent induced current, the magnetic flux must remain constant. Because the magnitude of the magnetic field has increased, the area must decrease, so the diameter must also decrease.
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