(a) Two parallel plates are charged positive and negative respectively. The separation between the plates is d = 0.050 m and the magnitude of the electric field between the plates
is E = 500 V/m. A proton is placed between two parallel plates and accelerated from the
positively charged plate to the negatively charged plate.
(0 What is electric potential of the proton? [2]
(1) What is the change in potential energy of the proton when accelerated from the
positively charged plate to the negatively charged plate?[2]
(ii) What is velocity of the proton?[3]
(b) Given a case in which an electron is accelerated from the positive plate to the negative
plate, would it be the electric field or the external force doing the work? Explain [2]​