In the figure, four charges are placed at the corners of a square of side a = 2

Question

In the figure, four charges are placed at the corners of a square of side a = 2 cm. What is the electrostatic potential energy of this system relative to infinity?

-150 J -75 J -120 J -130 J -58 J In the figure, four charges are placed at the corners of a square of side a = 2 cm. What is the electrostatic potential energy of this system relative infinity? In the figure, charges are placed at the corners of a square of side a = 2 cm. What is the electrostatic potential energy of this system relative to infinity?

Explanation / Answer

potentail energy U = Kq1q2/r + Kq2q3/r + Kq3q4/r+Kq1q4/r

U = 4 * 9e9 * 8*8*10^-12/0.02

U = -115 J     = -120 J

option C

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