Exercise 1 2 . 1. An electron beam is accelerated from a potential of -50V to a potential of +1000V +600V +350V. Calculate the potential +600V B energy of the electron at: +400V a) -50V In the situation above, a test charge is moved from A to C. Calculate the change in b) +350V potential energy if the charge is: a) +3.0HC c) What is the change in potential energy? b) - 2.0 UC