Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 3 - Vectors - Questions - Page 56: 9(3)a



Work Step by Step

We know that $q $ is positive and we want $\vec{v}\times\vec{B}$ to have the same direction as $\vec{F}$ , which is $-\mathrm{y}$. Now, we will use the right hand rule (see fig. 3.19 on p. 53) as follows: Outstretch your right arm and turn your hand so your thumb points down. The fingers are pointing to the right (the fingers represent $\vec{v}$ in the $+x$ direction, and the thumb $\vec{v}\times\vec{B}$ in the $-y$ direction). Swipe your fingers roughly for a right angle. The fingers now point behind you; This is the +z direction, when compared to the diagram. This is where $\vec{B}$ points.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.