Electricity and magnetism Flashcards
1
Q
What is thermionic emission?
A
When you heat a metal wire hot enough, some electrons gather enough energy to escape the solid metal, this is thermionic emission
2
Q
What is an electron’s (charge e) kinetic energy if you accelerate it across a pd of V?
What about it’s velocity?
A
ke=eV
v=sqrt(2ev/m)
