A Şıkkı
+q....d....+q.....d.....+q......d......+q
1 ve 2. cisim için potansiyel enerji ;
E1-2= k.qq/d= kq^2/d= E ise,
E3= E1-2+ E1-3+E2-3
E3= E+ kq^2/2d+ kq^2/d
E3= E+E/2+E= 5E/2 olur.
E4= E1-2+E1-3+E1-4+E2-3+E2-4+E3-4
E4= E+ E/2+ kq^2/3d+E+ kq^2/2d+ kq^2/d
E4= E+E/2+E/3+E+E/2+E
E4=(6E+3E+2E+6E+3E+6E)/6=26E/6=13E/3 olur.
