Four point charges form a square with sides oflength d , as shown in the figure.

Question

Four point charges form a square with sides oflength d, as shown in the figure. In the questionsthat follow, use the constant k in placeof 1/(4*_0). What is the total electric potentialenergy U_tot of this system of charges? My Problem is as follows. Apparently there are six sidesto this. I believe I found the obvious four or at least whatI think are the obvious four. Can someone please help me withthe six sides? My Problem is as follows. Apparently there are six sidesto this. I believe I found the obvious four or at least whatI think are the obvious four. Can someone please help me withthe six sides?

Explanation / Answer

Potential energy U =[-Kq*2q / d] +[-k q * -3q / d] +[-Kq*5q / r] +[-K2q*5q / d]

                                 + [-K*2q*-3q/ r]+[-K*5q*-3q /d ]

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