If an electric field is due to 2 parallel plate conductors carrying equal and opposite charges, which plate got the higher potential, positive one or negative one? Electric potential = Q/(4*pi*ε*r) If charge, Q is negative, electric potential is negative, does it mean that the negative plate has a lower potential than the positive one? However in a battery, say a dry cell, negative terminal has higher potential then the positive one. Hm... I'm a little bit confused.