The side of the cube is 'l' and point ch...

The side of the cube is `'l'` and point charges are kept at each corner as shown in diagram. Interaction electrostatic potential energy of all the charges is:

`(4kq^(2))/(sqrt(3)l)`

`(sqrt(3)kq^(2))/(l)`

`(2kq^(2))/(sqrt(3)l)`

`(kq^(2))/(sqrt(3)l)`

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