Question: Four identical charges Q are placed at the corners of a square of side L. (a) In a free-body diagram, show all of the forces

Four identical charges Q are placed at the corners of a square of side L.
(a) In a free-body diagram, show all of the forces that act on one of the charges.
(b) Find the magnitude and direction of the total force exerted on one charge by the other three charges.

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