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# Four point charges are individually brought from infinity and placed at the corners of a square as shown in the figure. Each charge has the identical...

Four point charges are individually brought from infinity and placed at the corners of a square as shown in the figure. Each charge has the identical value +Q. The length of the diagonal of the square is 2a. What is the electric potential at P, the center of the square?

A) kQ/a B) 2kQ/a C) 4kQ/a D) kQ/4a E) zero volts