A proton is released such that its initial velocity is from right to left across this page.The proton's path,however,is deflected in a direction toward the bottom edge of the page due to the presence of a uniform magnetic field.What is the direction of this field?
A)out of the page
B)into the page
C)from bottom edge to top edge of the page
D)from right to left across the page

Question

Quizplus · Accepted Answer

According to the right-hand rule, if a charged particle is moving in a certain direction and it experiences a force perpendicular to both its velocity and the magnetic field, the magnetic field must be directed into the page. In this case, the proton's velocity is from right to left across the page, and its path is deflected towards the bottom edge of the page, so the magnetic field must be directed into the page. Thus, the correct answer is B.

A Proton Is Released Such That Its Initial Velocity Is