Physics: Principles with Applications (7th Edition)

Published by Pearson
ISBN 10: 0-32162-592-7
ISBN 13: 978-0-32162-592-2

Chapter 20 - Magnetism - General Problems - Page 587: 68

Answer

$p=qBr$

Work Step by Step

See Example 20-6. The magnetic force is the centripetal force. $$qvB=m\frac{v^2}{r}$$ Cancel out a factor of v. $$qB=\frac{mv}{r}$$ The momentum p is mv. $$qB=\frac{p}{r}$$ $$p=qBr$$
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