Pulsing beam of electrons

1. The problem statement, all variables and given/known data



2. Relevant equations



3. The attempt at a solution

I'm at a loss as to starting the problem. Any help is appreciated!

 

i = dQ/dt, but I can't figure out how to derive/integrate here :(

 

Thank you very much, I forgot the elementary relation Q = it. I got 3.1 * 10^11 electrons for a) which is the right answer :)

For part b), do we just divide average current per pulse by number of pulses per second?

 

Yup, got it. Part c) ?

 

Again, I have forgotten that electrons having an energy of 50 MeV have been accelerated across 50 MV. Thanks!