A point charge of +Q is placed at the center of a square,
vj7kt3;ag(8: 1raslq sheba 9 and a second point 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 that acts on the center charg
bqat97g j 1a8eshk(a vl:;3 rse if a third charge of -Q is placed at the lower-left corner?