An electric field of magnitude 5.25 x 10' n/c points due south at a certain location. find the magnitude and direction of the force on 3-5.85 c charge at this location. magnitude in direction -selech four point charges are located at the corners of a square. each charge has magnitude 3.10 nc and the square has sides of length 2.10 cm. find the magnitude of the electric field in n/c) at the center of the square if all of the charges are positive and three of the charges are positive and one is negative. hint (a) all the charges are positive nc (b) three of the charges are positive and one is negative n/c