Posted by melody on .
Four point charges, each with Q = 7.2 µC, are arranged at the corners of a square of edge length 3.6 m. What is the electric potential at the center of the square?
V? Please show me how to solve this.Thanks

college physics,electric potential 
bobpursley,
electric potential is a scalar, that is, you can just add it. So figure the potential from one corner, multiply it by 4.
V=kQ/distance
distance=edge*sqrt2