6.5 Electron beams Flashcards
1
Q
How do electron guns distribute kinetic energy
A
They give each electron a kinetic energy to the product eV
2
Q
How does magnetic force affect the path of an electron
A
The magnetic force acts perpendicular to both B and v, and this makes an electron move in a circular path. the magnetic force forms the centripetal force needed for circular motion
3
Q
Why is there no work done on the electrons and what does this mean for the kinetic energy and the speed
A
Bev is always perpendicular to the path of electrons, no work is done on them. Because of this their kinetic energy and speed as they move in a circle remain constant
