University Physics with Modern Physics (14th Edition)

Published by Pearson
ISBN 10: 0321973615
ISBN 13: 978-0-32197-361-0

Chapter 28 - Sources of Magnetic Field - Problems - Discussion Questions - Page 947: Q28.17


See explanation.

Work Step by Step

The attraction of liquid oxygen droplets to the poles tells us that liquid oxygen is paramagnetic. As explained on page 942 and section 27.7, a material with atomic magnetic dipoles is pulled toward the poles of a magnet. Liquid nitrogen is diamagnetic. The reason that oxygen gas isn’t attracted to magnets is that paramagnetic susceptibility decreases rapidly with temperature (equation 28.32), and the attractive force becomes negligibly small at room temperature.
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