Four point charges have the same magnitude of 2.4 3 10212
Chapter , Problem 33(choose chapter or problem)
Four point charges have the same magnitude of 2.4 3 10212 C and are fi xed to the corners of a square that is 4.0 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric fi eld that exists at the center of the square.
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