Production of Cathode Rays Flashcards
1
Q
How are electrons accelerated?
A
High electric field ionises the gas, and positive ions are attracted to the cathode and strike surface electrons, electrons emitted and accelerated to anode.
2
Q
How can you control the beam?
A
With electric or magnetic field
3
Q
Electric Force = Magnetic Force
A
EQ = B(flux density) Q(e) V(elocity)
velocity = E/B
