Question: Repeat Exercise 14 for the case when the fourth charge is -q. Data From Problem 14 Three point charges +q and a fourth, -1/2 q,

Repeat Exercise 14 for the case when the fourth charge is -q.

Data From Problem 14

Three point charges +q and a fourth, -1/2 q, are assembled to form a square of side a. Find an expression for the electrostatic energy of this charge distribution.

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