Final answer:
The question requires specific numerical values or descriptions of figures to calculate the electric potential difference between two points in an electrostatic field. Without this information, we cannot provide a specific answer.
Step-by-step explanation:
The student's question pertains to the concept of electric potential difference in the context of electrostatics, a topic typically covered in high school physics. Unfortunately, the original question is missing specific numerical values for the positions of the point charges and the points A and B. To find the electric potential difference, we must have these values or descriptions of figures referenced in the question, otherwise we cannot provide a specific numerical answer. The electric potential difference (also known as voltage) between two points in an electrostatic field is the work done to move a unit-positive charge between those two points.
In a hypothetical scenario, if we were given the specific coordinates of the two identical charges and points A and B, we would calculate the electric potential due to each charge at point A and point B separately using Coulomb's law and then find the difference between these two potentials to obtain the electric potential difference.