Question

Two positive charges of magnitude q are each a distance d from the origin A of a coordinate system as shown above.

At which of the following points is the electric potential greatest in magnitude?

(A) A 

(B) B 

(C) C 

(D) D 

(E) E

Answer 1

The correct option is: (A) A 

Explanation:

V = ΣkQ/r and since both charges are positive, the largest potential is at the closest point to the two charges (it is more mathematically complex than that, but this reasoning works for the choices given)