APFIVE Electric Potential Energy of a Charge System
A system consists of four identical point charges q = 2.0 nC arranged in a square of side length a = 10 cm. If one charge is moved to the center of the square, by how much does the electric potential energy of the system change?
A
Decreases by 1.08 × 10⁻⁷ J
B
Increases by 5.52 × 10⁻⁷ J
C
Increases by 1.08 × 10⁻⁷ J
D
Decreases by 3.24 × 10⁻⁷ J
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