A stream of electrons in a magnetic field would
A)be unchanged.
B)be stopped.
C)be deflected toward the positive electrode.
D)be deflected toward the negative electrode.

Question

Quizplus · Accepted Answer

When a stream of electrons passes through a magnetic field, it experiences a force perpendicular to the direction of motion and the magnetic field. This force is known as the Lorentz force. The direction of the force is perpendicular to both the direction of motion of the electrons and the direction of the magnetic field.

In the case of a negative stream of electrons, the force is perpendicular to the magnetic field, and in the opposite direction to the force acting on a positive charge moving in the same direction. Hence, the electrons would be deflected towards the positive electrode. Therefore, the best choice is C.

A Stream of Electrons in a Magnetic Field Would