1) A square with sides of length L has a point charge at each of its four corners. Two corners that are diagonally opposite have charges equal to +1.00 µC; the other two diagonal corners have charges Q. Find the magnitude and sign of the charges Q such that each of the +1.00 µC charges experiences zero net force.
2) Two point charges, the first with a charge of +2.95 multiply.gif 10-6 C and the second with a charge of -5.15 multiply.gif 10-6 C, are separated by 25.5 cm.
(a) Find the magnitude of the electrostatic force experienced by the positive charge.