Answer to Question #45986 in Electricity and Magnetism for esosa

Question

Charges of +2 C and −2C are situated at points P and Q respectively which are at a distance apart. A point X is mid-way between P and Q. Which of the following correctly describes the electric field and the electric potential at point X?
electric field is toward Q, electric potential is zero
electric field is toward Q, electric potential is negative
electric field is toward P, electric potential zero
electric field is toward P, electric potential is positive