An electron moving in the positive x direction experiences a magnetic force in the positive z direction. If B_x = 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 charge is given by the cross product of the velocity and the magnetic field vectors. Since the electron is moving in the positive x direction and the force is in the positive z direction, the magnetic field must be in the negative y direction to satisfy the right-hand rule for a negative charge like an electron.

An Electron Moving in the Positive X Direction Experiences a Magnetic