A point charge of +Q is placed at the center of a square, and a second poin
a(*ug mathiad9 19nn1 t charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of the force t
n d9a* a1(ngh1m9 uaithat acts on the center charge if a third charge of -Q is placed at the lower-left corner?