Question: Four 0.8 nC point charges are located in free space at the corners of a square 4 cm on a side. (a) Find the total

Four 0.8 nC point charges are located in free space at the corners of a square 4 cm on a side.

(a) Find the total potential energy stored.

(b) A fifth 0.8 nC charge is installed at the center of the square. Again find the total stored energy.

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