Four identical point charges Q are placed at the corners of a rectangle which measures 3.00 m * 5.00 m.The potential at the geometric center of this rectangle is 32.2 V assuming that the electric potential is zero at infinity.The charge Q is

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The potential at the center due to each charge is kQ/r, where r is the distance from the charge to the center. The total potential is 4 times this value. Solving for Q using the given potential of 32.2 V gives Q = 2.61 nC.

Four Identical Point Charges Q Are Placed at the Corners