Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 21 - Magnetic Forces and Magnetic Fields - Check Your Understanding - Page 588: 4

Answer

(b) No, because a magnetic field cannot exert a force on a charged particle that is moving anti-parallel to the field

Work Step by Step

Here, the direction of velocity vector $(\vec v)$ of the charged particle is anti-parallel to the external magnetic field $(\vec B)$. According to the formula of magnetic force, $\vec F =q(\vec v \times \vec B)$, a charge particle does not experience any magnetic force as it moves parallel or anti-parallel to the field $\vec B$. Thus, in this case, the magnetic field would not prevent the charge particle from reaching the north pole.
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