College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 19 - Problems - Page 752: 14

Answer

The magnetic force is $5.12 \times 10^{-14}~N$ and this force is directed out of the page.

Work Step by Step

We can find the magnetic force: $F = q~v\times B$ $F = (-1.6\times 10^{-19}~C)(8.0\times 10^5~m/s)(0.40~T)$ $F = -5.12 \times 10^{-14}~N$ By the right hand rule, $v \times B$ would be directed into the page if the charge was positive. However, the negative charge results in a force directed out of the page. The magnetic force is $5.12 \times 10^{-14}~N$ and this force is directed out of the page.
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