Two parallel plates are charged. The separation between the plates is 2 cm and the magnitude of the electric field between the plates is 500 Volt per meter. A proton is accelerated from the positively charged plate to the negatively charged plate. The change in the potential energy in electron volts (eV) of the proton equals:
a) 0.5
b) 1.0
c) 5.0
d) 10