An electron moving in the positive x direction experiences a magnetic force in the positive z direction.If Bx = 0, what is the direction of the magnetic field?
A)negative y direction
B)positive y direction
C)negative z direction
D)positive z direction
E)negative x direction

Question

Quizplus · Accepted Answer

The magnetic force on a moving electron is given by the Lorentz force equation: F = q(v x B), where q is the charge of the electron, v is its velocity, and B is the magnetic field. In this case, the electron is moving in the positive x direction and experiences a magnetic force in the positive z direction. This means that the magnetic field must be in the negative y direction, since the cross product of the velocity and magnetic field vectors must be in the positive z direction.

An Electron Moving in the Positive X Direction Experiences a Magnetic