An α-particle has a charge of +2e and a mass of 6.64
× 10-27 kg. It is accelerated from
rest through a potential difference that has a value of 1.51
× 106 V and then enters a uniform
magnetic field whose magnitude is 3.87. The α-particle moves perpendicular to the magnetic field at
all times. What is (a) the speed of the α-particle
I have the problem all set up to what final velocity is after using conservation of energy but all I need now is to figure out what delta V is. Do I just assume that delta V is just 1.51
× 106 V since the particle starts at rest?
Haven't done one of these in a while. Are they giving you the potential in volts? Which would make sense I guess. Can't you get velocity by using 1/2 Mv^2 since you know m, and could know energy if you know the total energy change. Or use f=ma and replace f with the coulomb force equation or whatever it's called. I might be saying random stuff, hopefully it points you the right way. Like I said, I havent done one of these in a while.
I took calculus based physics that involved this like a year ago, this was useful because it's related to how mass spectrometers work. I bet mass spec is in a lot of example problems. But I'd have to read my notes or do a few problems to remember, cause right now I'm derping hard.