- #1
krbs
- 51
- 3
Homework Statement
The device has two parallel plates, one positively charged and one negatively. The positive plate has a hole to allow electrons to fire out of it.
b) How can the device be modified to accelerate protons?
c) How does the escape velocity of a proton compare to that of an electron, if the electric field were the same? Explain.
Homework Equations
a = qε/m
The Attempt at a Solution
Part c is what I'm unsure about. Are they assuming that I've modified the device, but the electric field has the same magnitude?
If so, my educated guess is as follows:
The particles have equal but opposite charges and experience the same field, but a proton has a larger mass and will be accelerated less before exiting the device; therefore, it will have a lower exit speed.
On the other hand, assuming the device has not been modified, the proton would still have a lower exit speed (probably won't exit at all) because it's attracted to the negative plate.