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Six equal point charges q each are place...

Six equal point charges q each are placed at six corners of a hexago of side a. Find out potential energy of charge system

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`U_("Net")-(U_(1)+U_(2)+U_(3)+U_(4)+U_(5)+U_(6))/(2)`
Due to symmetry `U_(1)=U_(2)=U_(3)=U_(4)=U_(5)=U_(6)" "`So `U_("net")=3U_(1)=(3Kq^(2))/a[2+2/sqrt(3)+1/2]`
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