ASR YOUR TEACHER PRACTICE ANOTHER Four point charges are located at the corners of a square. Each charge has magnitude 2.30 nC and the square has sides of length 3.40 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 N/C (b) three of the charges are positive and one is negative N/C Need Help? Read It Watch It