University Physics with Modern Physics (14th Edition)

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

Chapter 27 - Magnetic Field and Magnetic Forces - Problems - Discussion Questions - Page 911: Q27.9


See explanation.

Work Step by Step

Equation 27.19 tells us the magnetic force on a current-carrying wire, $\vec{F}=I\vec{l}\times \vec{B}$. The direction depends on both the current’s direction $\vec{l}$ and the magnetic field $\vec{B}$. We should orient the straight-line current in different directions, and note the direction of the force in every case. There will be only one direction for the magnetic field $\vec{B}$ that is consistent with the right hand rule and the directions of the current and of the magnetic force.
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