Answer to Question #88646 in Electricity and Magnetism for jason

Question

The direction of deflection of an electron beam in a magnetic field can be determined by

Answer 1

Electrons carry negative charge. For any given charge in motion through a magnetic field, that charge will experience a force proportional to the speed and rhe strength of the magnetic field. The force will also vary with the angle between the magnetic field and the direction of motion; the force is strongest when the two are at right angles, and zero when pointed in the same direction. The magnitude of the force will be equal to qvB sin(t), where q is the electron’s charge, v is the electron’s speed, B is the magnetic field strength, and t is the angle between the magnetic field and the direction of motion.

To find the direction of the resulting force, use the left hand rule