Posted by **Crystal** on Thursday, February 24, 2011 at 5:09pm.

Consider a square of side length a = 9.4 cm with charged particles at each of the corners.Three of the particles carry +9 nC of charge while the fourth particle carries -9 nC.In volts, what is the electric potential at the center of the square?

Hint: Choose the potential to be zero for a position very far from the square.

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